Thank you Ray. We've switched to the Sage Pay live server this evening and are getting the following:
This transaction attempt has failed. We are unable to redirect you back to the web store from which you were purchasing. The details of the failure are given below.
Status Detail: 3045 : The Currency field is missing.
This is all working fine in test so I'm at a complete loss as to why changing this:
...and updating our encryption password to the live encryption password is causing, of all things, the Currency field to be destroyed. :(
Hoping you can help us resolve this issue between eCart and Sage Pay. Thank you Ray.
PS. It didn't even get as far as the Sage Pay payment pages so why it's suggesting that it couldn't redirect back to the web store from which we were purchasing is anyone's idea.