I'm using the WorldPay Select Junior Module that is bundled with osCommerce Online Merchant v2.2 rc1. The only contribution I have installed is WPA 0.910.
I've used different configurations to the callback process (http://<wpdisplay item="MC_callback">) through my WP Admin page and spoken at length with WorldPay Tech Support who can only suggest it has something to do with the MCC but as yet have not offered any solution.
The problem I'm having is well documented on the forums here but all of suggested fixes revolve around configurations of the file "catalog/wpcallback.php" which does not seem exist in the WorldPay Select Junior Module, well it doesn't in my install anyway.
I'm still running in "test mode"
My problem is:
Ordering items from the shop proceeds normally and concludes with the WorldPay page - with no way back to the shop:
QUOTE
Thank You.
This was NOT a live transaction - no money has changed hands
Thank you, your payment was successful
Merchant's Reference: *******************
WorldPay Transaction ID: *********
Please contact WorldPay immediately if there has been a problem making your payment.
This was NOT a live transaction - no money has changed hands
Thank you, your payment was successful
Merchant's Reference: *******************
WorldPay Transaction ID: *********
Please contact WorldPay immediately if there has been a problem making your payment.
The customer receives notification of the transaction from WorldPay but no email confirming what they've ordered
I receive notification of the transaction from WorldPay but no email confirming what they've ordered
The orders do appear in the Customers section in osCommerce Admin but these are added to any consequent order made by the same customer
Please can you advise me if I should I uninstall WorldPay Select Junior Module and replace it with an earlier version (the one with catalog/wpcallback.php which many claim works) and would I encounter problems with my WorldPay Junior account if I did that?
Any help would be much appreciated - thanks

