DrByte:
Okay, let's start from the beginning.
I just set up a clean brand new install of v1.3.8a, including demo data, but with no addons.
Then I went into the Payment Modules and enabled Authorize.net AIM. I didn't touch anything else in the admin. No changes to other payment modules, no changes to shipping modules. Nothing.
I created an account as a customer with an address in Texas.
I've tried adding various demo products to my cart and commenced checkout.
No matter what product I try (single products, free products, multiple products, downloads, no downloads, many combinations), or what shipping option I choose on the shipping page, I can't trigger the "Sorry, we are not accepting payments from your region" message on the payment page.
DrByte:
Well, I'm not sure what to say. I have configured my installation as "sensei's" at ZenCart, or help files suggest. For the most part, my configuration was to obtain as minimal of a "store" as possible. Regardless of whether you could duplicate it...I am getting this error. If I recall correctly, this did not occur until I took my installation and Authorize.net off of test mode. However, I cannot see what this could have to do with putting Authorize.net into active mode (at their website) from their test mode.
Remember, please, that this has nothing to do with ZERO prices or free items. The error comes up before submitting a credit card for payment and occurs, so far as I know, even with a non-zero payment...but, I will check to verify that.