Hi Connor - hope you read this...

Everything OK with 3.4.2 except for Mastercard use - where everytime the card is being 'declined by the bank'

Zen cart reports:

Your card could not be authorised! Please correct any details below and try again, try another card or contact us for further assistance.

(2000 : The Authorisation was Declined by the bank.)

Protx shows the same decline detail. Can't think what's wrong - I'm using the basic defaults and other cards seem OK.

Anybody got any ideas on this?

regards