Great thanks for that.
What versions of SS and ecommerce are you running? Same goes for anyone else interested ...
The last stable build of ecommerce (0.5.2) doesn't really work with SS 2.3+ and there are some huge changes between 0.5.2 and the current trunk version (which works better with SS v2.3).
Because of this, I am re-coding the Paymate payment class to work on the current trunk version of ecommerce and am mostly there, just have to get my head around (intelligently) dealing with payment records and receipt emails.
Should have a working version by the end of the week and will post it then.
Cheers,
Rich