The Advanced Integration Method (AIM) is the way to connect your website directly to the Authorize.Net gateway. It gives you the full control over data used in the processing of a transaction and allows you to keep the customer on your own website during the whole transaction process. However, implementing AIM connectivity requires some programming skills, as AIM employs your server to forward data to the Authorize.Net gateway. www.santilab.com...
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Support for Santilab Authorize.Net Aim Integrator is available from the
publisher/developer site 
This download (Santilab Authorize.Net Aim Integrator) is shareware. "Shareware is a marketing method for computer software. Shareware software is typically obtained free of charge, either by downloading from the Internet or on magazine cover-disks. A user tries out the program, and thus shareware has also been known as "try before you buy". A shareware program is accompanied by a request for payment, and the software's distribution license often requires such a payment." More info at
Wikipedia.
Soft32 (ITNT) cannot be held liable for issues that arise from the download or use of these software products. We encourage you to determine whether this software or your intended use is legal. Even if we try to check the program files for viruses, we cannot guarantee 100% that they are clean. For your own protection always check downloaded files for viruses, spyware and malware.