Thanks,
The error is
Failure8520a248875ecTransaction refused because of an invalid argument. See additional error messages for details.The transaction currency specified must be the same as previously specified.10444Error63.016619266" }
I set the currency for my cart to CHF in the lines
$WA_PP_ECO_Set_params[1][$nextIndex] = "CHF";
within the confirm.php and
// eCart Language Pack [En]
$bikecart = new bikecart_Definition("bikecart", 0, "CHF", "", true, 2, 2, "kg", true, 2, 1, 0, array(array("ID","N"), array("Name","T"), array("Description","T"), array("Thumbnail","T"), array("Weight","W"), array("Quantity","N"), array("Price","C"), array("Category",""), array("Stock","")));
within bikecart_PHP.php
Is there somewhere else I also need to update the currency?