diff --git a/htdocs/paybox/lib/paybox.lib.php b/htdocs/paybox/lib/paybox.lib.php
index 8e156b8ef5d..925fda59120 100755
--- a/htdocs/paybox/lib/paybox.lib.php
+++ b/htdocs/paybox/lib/paybox.lib.php
@@ -221,7 +221,7 @@ function print_paybox_redirect($PRICE,$CURRENCY,$EMAIL,$urlok,$urlko,$TAG)
     print '<input type="hidden" name="PBX_TXT" value="'.$IBS_TXT.'">'."\n";
     print '<input type="hidden" name="PBX_BKGD" value="'.$IBS_BKGD.'">'."\n";
     print '<input type="hidden" name="PBX_WAIT" value="'.$IBS_WAIT.'">'."\n";
-    print '<input type="hidden" name="PBX_LANG" value="'.$IBS_LANG.'">'."\n";
+    print '<input type="hidden" name="PBX_LANGUE" value="'.$IBS_LANG.'">'."\n";
     print '<input type="hidden" name="PBX_OUTPUT" value="'.$IBS_OUTPUT.'">'."\n";
     print '<input type="hidden" name="PBX_SOURCE" value="'.$PBX_SOURCE.'">'."\n";
     print '<input type="hidden" name="PBX_TYPEPAIEMENT" value="'.$PBX_TYPEPAIEMENT.'">'."\n";
diff --git a/htdocs/public/paybox/newpayment.php b/htdocs/public/paybox/newpayment.php
index addbc3c6ccf..bf95a1a131c 100644
--- a/htdocs/public/paybox/newpayment.php
+++ b/htdocs/public/paybox/newpayment.php
@@ -158,7 +158,6 @@ print '<center>';
 print '<form id="dolpaymentform" name="paymentform" action="'.$_SERVER["PHP_SELF"].'" method="POST">';
 print '<input type="hidden" name="token" value="'.$_SESSION['newtoken'].'">';
 print '<input type="hidden" name="action" value="dopayment">';
-print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
 print '<input type="hidden" name="tag" value="'.GETPOST("tag",'alpha').'">';
 print '<input type="hidden" name="suffix" value="'.GETPOST("suffix",'alpha').'">';
 print "\n";
@@ -247,7 +246,11 @@ if (! GETPOST("source") && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -329,7 +332,11 @@ if (GETPOST("source") == 'order' && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -412,7 +419,11 @@ if (GETPOST("source") == 'invoice' && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -583,7 +594,11 @@ if (GETPOST("source") == 'contractline' && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -688,6 +703,7 @@ if (GETPOST("source") == 'membersubscription' && $valid)
 	{
 	    $valtoshow=GETPOST("newamount",'int');
 	    if (! empty($conf->global->MEMBER_MIN_AMOUNT) && $valtoshow) $valtoshow=max($conf->global->MEMBER_MIN_AMOUNT,$valtoshow);
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
 	    print '<input class="flat" size="8" type="text" name="newamount" value="'.$valtoshow.'">';
 	}
 	else {
diff --git a/htdocs/public/paypal/newpayment.php b/htdocs/public/paypal/newpayment.php
index 7aa2743b840..f2f8842843a 100755
--- a/htdocs/public/paypal/newpayment.php
+++ b/htdocs/public/paypal/newpayment.php
@@ -252,7 +252,6 @@ print '<center>'."\n";
 print '<form id="dolpaymentform" name="paymentform" action="'.$_SERVER["PHP_SELF"].'" method="POST">'."\n";
 print '<input type="hidden" name="token" value="'.$_SESSION['newtoken'].'">'."\n";
 print '<input type="hidden" name="action" value="dopayment">'."\n";
-print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">'."\n";
 print '<input type="hidden" name="tag" value="'.GETPOST("tag",'alpha').'">'."\n";
 print '<input type="hidden" name="suffix" value="'.GETPOST("suffix",'alpha').'">'."\n";
 print '<input type="hidden" name="securekey" value="'.$SECUREKEY.'">'."\n";
@@ -341,7 +340,11 @@ if (! GETPOST("source") && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -420,7 +423,11 @@ if (GETPOST("source") == 'order' && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -523,7 +530,11 @@ if (GETPOST("source") == 'invoice' && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -714,7 +725,11 @@ if (GETPOST("source") == 'contractline' && $valid)
 	print '<tr class="CTableRow'.($var?'1':'2').'"><td class="CTableRow'.($var?'1':'2').'">'.$langs->trans("Amount");
 	if (empty($amount)) print ' ('.$langs->trans("ToComplete").')';
 	print '</td><td class="CTableRow'.($var?'1':'2').'">';
-	if (empty($amount) || ! is_numeric($amount)) print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	if (empty($amount) || ! is_numeric($amount))
+	{
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
+	    print '<input class="flat" size=8 type="text" name="newamount" value="'.GETPOST("newamount","int").'">';
+	}
 	else {
 		print '<b>'.price($amount).'</b>';
         print '<input type="hidden" name="amount" value="'.$amount.'">';
@@ -837,6 +852,7 @@ if (GETPOST("source") == 'membersubscription' && $valid)
 	{
 	    $valtoshow=GETPOST("newamount",'int');
 	    if (! empty($conf->global->MEMBER_MIN_AMOUNT) && $valtoshow) $valtoshow=max($conf->global->MEMBER_MIN_AMOUNT,$valtoshow);
+        print '<input type="hidden" name="amount" value="'.GETPOST("amount",'int').'">';
 	    print '<input class="flat" size="8" type="text" name="newamount" value="'.$valtoshow.'">';
 	}
 	else {