dfid you find out how to make this work? i am getting the same error message.

this is the first time i have ever tried integrating a payment gateway so im 'flying blind'

I am experiencing the same issue (both on WorldPay Test and WorldPay Gateway). WorldPay tested from their end and said all the credentials are correct, but they are not receiving a ping from Business Catalyst at all.
Can anyone shed any light on what I might be doing wrong, or how to get this connection working?
The site is www.nuzest.co.uk

HI Mon_adobe

Please make sure that your Installation ID field from BC payment gateway pay , is a number. Please contact worldpay support and ask for this ID

If you still have issues  , please open a support ticket and we will investigate this further

Thx

Silviu