if your add to cart buttons are static (not using a database) you need to set the column value to 1 or 0 in the add to cart buttons, same way you are setting item name item price, directly in the add to cart button bindings.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.