If you are getting $_FILES on the page, then that means that you are dragging the a file field (a browse button). Instead you would want to drag the Server File Name if you are using Digital File Pro to upload the file.
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.