Paypal succesful but returning blank page

[linvicch]

i am testing using the paypal sandbox:

Prestashop :1.4.3

paypal 2.4

PS is running on 64bit win 7 home

using WampServer2.1d-x64.

 

 

 

Hi, great job on prestashop. It was easy enough to get everything set up but i ran into this issue when after a user click on pay now in paypal, the transaction is successful in paypal (payments going through), the order is created correctly in PS but all i get is a blank page when paypal returns to PS

 

http://myserver.com.au:8081/prestashop/modules/paypal/payment/submit.php?fromPayPal=1&token=EC-8KH67793VN641763P&PayerID=PXJYV592QGS9U (BLANK PAGE)

 

I have display_error switched on but none were displayed. If i click refresh(F5) i get the following error

 

METHOD=DoExpressCheckoutPayment&VERSION=60.0&PWD=1311256989&USER=seller_1311256952_biz_api1.gmail.com&SIGNATURE=Al2b6qlVlPKAUDKx02DTWRa9NPPmAl4IxBS2YBJd1wzgzNMgibSVVu5Z&TOKEN=EC-1WK605244R129430T&PAYERID=PXJYV592QGS9U&PAYMENTACTION=Sale&AMT=74.66&CURRENCYCODE=AUD&IPADDRESS=linvicch.dyndns.org&NOTIFYURL=http%3A%2F%2Flinvicch.dyndns.org%3A8081%2Fprestashop%2Fmodules%2Fpaypal%2Fipn.php&BUTTONSOURCE=PRESTASHOP_ECM&SHIPTONAME=+v+t&SHIPTOSTREET=3A+Stiletto+way+&SHIPTOCITY=canning+vale&SHIPTOSTATE=WA&SHIPTOCOUNTRYCODE=AU&SHIPTOZIP=6155&L_NAME0=iPod+shuffle+-+Color+%3A+Green&L_AMT0=66.05&L_QTY0=1&ITEMAMT=66.05&SHIPPINGAMT=2&TAXAMT=6.61<br />Send with fsockopen method successful<br /><b>PayPal response:</b><br />TIMESTAMP -> 2011-07-25T15:23:38Z<br />CORRELATIONID -> ff66a1cb519e6<br />ACK -> Failure<br />VERSION -> 60.0<br />BUILD -> 1968762<br />L_ERRORCODE0 -> 10415<br />L_SHORTMESSAGE0 -> Transaction refused because of an invalid argument. See additional error messages for details.<br

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/>L_LONGMESSAGE0 -> A successful transaction has already been completed for this token.<br />L_SEVERITYCODE0 -> Error