Hi Conor,
many thanks for your help, i'll upgrade the module tomorrow.... On another subject (which hopefully won't be relevant after upgrade), we have received the order today, which registered with zen cart, however no payment went to protx (not even failed transaction, nothing is recorded in the VPS admin) - protx support confirmed that. Protx is our only payment option.
The order looks different from other orders in the admin though, it has

Invoice No. 20
Date Purchased: Wednesday 12 September, 2007
Payment Method: Credit/Debit Card (Secured by Protx)


But no info on the credit card details at all. (which are normally displayed in a grey box just below it. I'm using zen cart 1.3.7 and free protx module (the one released just before the upgraded for new PREAUTH rules). Any thoughts how this could have happend? i've tryed to replicate it bit other orders go just fine.
Many thanks, Alex