Joomla - VM2 - Authorize.net - Recurring Payments

[Vent]

http://gisave.com/index.php/gisave-purchase

I have an authorize.net account, a Joomla site and VM2.  I set up a product list and a payment method but the nature of my products is that they're meant to billed automatically monthly or annually.  How would I go about doing this?

[jackrobert]

Can any one explain me what is 2nd site recurring billing process and why use recurring billing and pre automated payment