How to get FEC (Fast Easy Checkout) module work with AuthorizeNet and fix this error message? "The first four digits of the number entered are: ..."

[minipassat]

Hello,

 

I've read through the related posts and couldn't find any solution. My question is based on this post http://www.oscommerce.com/forums/..authorize-net-aim-module_888883

 

My OSC version is ms2. I am using FEC V1.6 module and recently having this issue after installing AuthorizeNet AIM GPL module. I keep getting this error message even if i enter the correct valid credit card info:

 

The first four digits of the number entered are: <br>If that number is correct, we do not accept that type of credit card.<br>If it is wrong, please try again.

 

It even doesn't specify the 4 digit numbers. I've tried visa, master and discover card, still giving me this error message.

 

I tried this post http://www.oscommerce.com/forums/...authorize-net-aim-module_p_885888 and replaced all of the "$_POST" in the file (catalog/includes/modules/payment/authorizenet_aim.php), with "$HTTP_POST_VARS".

 

Still not working. Can anyone help please? Much much appreciated!