add a hidden form element to the update form, bind the in initial value for the form element tot the image column from your recordset.
then in the Upload Image behavior, bind the Default File Name to the hidden form element.
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.