I thought I got everything set up, but I get this error message:

Warning: array_merge() [function.array-merge]: Argument #1 is not an array in /home/antieucl/public_html/includes/modules/payment/paypalwpp.php on line 1467

Warning: array_merge() [function.array-merge]: Argument #2 is not an array in /home/antieucl/public_html/includes/modules/payment/paypalwpp.php on line 1467

Warning: Cannot modify header information - headers already sent by (output started at /home/antieucl/public_html/includes/modules/payment/paypalwpp.php:1467) in /home/antieucl/public_html/includes/modules/payment/paypalwpp.php on line 1492

Warning: Cannot modify header information - headers already sent by (output started at /home/antieucl/public_html/includes/modules/payment/paypalwpp.php:1467) in /home/antieucl/public_html/includes/functions/functions_general.php on line 44

Anyone know how to fix it?