Authorize.net Expert

[ixex]

Greetings,
I am looking for an Authorize.net expert to fix a transaction problem occurring from three shopping carts (Open Cart) that are currently hooked to the gateway. All three are on my dedicated server. There is a fourth shopping cart (BigCommerce) which is on a different server, is also hooked to the gateway, but suspected that it is not the source of the issue anyway.
If interested please PM me with your qualifications and I will explain further if qualified.

Thank you,