Now I get a blank page with no error message... which doesn't give me much to go on.
Try adding this to the top of the page:
is the perm URL parameter being passed in?
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.