Authorize.net not working; need "response string" within coding to fix

[jyoung]

When I try to complete an order on my new ecommerce site, I receive the following error message:
Order not completed, data is not valid
The required data for this payment method is missing.

I contacted Authorize.net. They said that it doesn't look like the transactions are hitting Authorize.net's system.

They told me I would need to find the response string within the coding and forward it to them so they could investigate what the problem is.

Does anyone know how I would find this response string? They need it to look into this issue.

Thanks.

[DrZero]

Did you ever figure this out or get this fixed?  If you did I would really like to know how you did it or where you found the fix.

Thanks in advance!

[Stonedfury]

Waking all these related post up as I have just experienced this problem and am in desperate need of solution. Exception to my error is there is nothing beyond "data is not valid"

VM 2.0.24 J2.5.14 php 5.4 cURL enabled and valid SSL