The response may not be blank... it may just be XML, which won't show unless you view the source code.
Try looking there and see if that sheds some light on the problem.
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.