Anyone here using Worldpay in the UK?

As the title, anyone here using Worldpay in the UK? Everything work ok with 1.4.9.4? Any issues at all?

I am just going through the test process. Theres certainly some head scratching at my end.

First confusion was 'What is the Merchant ID', which is asked for in the Opencart module. It is actually your installation number within your WorldPay login area under 'Installations'.

I am currently working out why a test transaction does not transfer back to the original site. It goes through successfully, then stops at the 'Payment Successful' screen on Worldpay but does not return to the original site.

I seem to be having the same prob a few other are also experiencing through the forum.

Namely, the test transaction does not redirect back to the original site.

The order does not appear in the admin area, but does appear underneath 'Missing Orders' in the [Sales]->[Orders] area. I think this could be something to do with the callback, but am not sure what.

Still tweaking stuff, because this can not become a massive issue.

I currently think I have found the problem.

Error reported: Callback to
http://www.mysite.com/index.php?route=p ... %2Fcallbac
k: NOT OK, recevied HTTP status: 503

Because our site genuinely is in Maintenance mode, a 503 code is given. I am looking to move the site out of maintenance mode to give the callback another test.