Hi there,

After hours upon of hours of trawling related forums and trying various things I think I have finally nailed what has been causing our Worldpay payments to suddenly return Callback Failures 302 error.

It happened at just the same time as our host, Hostpapa, upgraded to PHP 5.3.

I haven't managed to yet speak to anyone willing to offer real help from their company, but does anyone have an idea of which things I need to quiz them on that might have changed in the PHP config?

I have read about session settings, which seems more likely than it timing out or anything, but I know next to nothing about servers.

Thanks for any help!
Nick