Is the name of your upload object: UploadFormRequest?
It seems that may be the wrong value, but I'd have to look at your code to be sure.
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.