Vantage 8.03 and ESDM

After working with Epicor for months and even paying Epicor to install and configure ESDM on our server, we find our selves unable to process credit cards through Vantage.  Epicor said we need to upgrade from 8.03.408a to 8.03.410 to make ESDM work.  I know what a nightmare it is going to be to out of the blue just upgrade Vantage; broken customizations and endless one-offs, etc.

So I wanted to ask this group if anyone running less then 410 has been able to get credit card processing to work in Vantage.

Steven G.