Worldpay Callback Error

I successfully used the Worldpay plugin in Sep - Nov 2016 to run an event. The callback worked fine updating the registration to "paid" and filling in the Transaction ID.

This year using the same Worldpay account with no adjustment of the Worldpay config the EB Worldpay payment plugin is not changing the status of the registration to paid after a successful payment.

Payment Response URL:
http://MYDOMAINNAME/index.php?option=com_eventbooking&task=payment_confirm&payment_method=os_worldpay&notify=1
Payment Response enabled:
CHECKED

Please can you provide a fix this issue urgently.

Hi John

I will need to have a quick check at your setup. Could you please submit a support ticket sending us super admin account, I will look at it and guide you to check it further

Tuan