connect my site to Authorize.net payment gateway

I am a small ISP, I currently take payments online and I wish to change my payment gateway to [login to view URL] My website is classic ASP and I do not wish to change it.? Your code should allow me to pass information to your code for processing as you specify using classic ASP and? pass back the information from the gateway that I can again use classic asp to update our database with.? The features we will be using are [login to view URL] AIM (Advanced Integration Method) and ARB (Automated Recurring Billing)