I'm using your latest Slick Upload module and implemented the ClientAPI version in my project.  I was able to get it up and running doing exactly what I wanted locally, but when I uploaded it to my beta server I'm getting strange and intermittent results.

Basically, when I attempt to upload any file (individually or multiple), the progress bar freezes at an non-specific point and nothing further occurs.  Behind the scenes, the upload tool is causing my processor to be chewing away at 100% used for about 3 minutes until the process clears.

The difficult part here is that I'm uncertain as to how to diagnose this problem.  No errors are thrown, and I don't see anyway to debug this (perhaps something in Visual Studio I need to do, but I'm unaware of how to set that up).  I could use your help figuring out how to find the root of the issue.  The behavior reminds me of StackOverflowExceptions or endless loops however I've commented all of my post-processing code out so it's nothing that I can see.  Folder permissions maybe? Config setting? 

I'll check that out and see what happens.  Incidentally, it somehow stopped working locally for me now and I can finally get some debug code popping up.  It's basically indicating that it can't locate the SlickUpload.axd file.  I'm trying to rebuild the project/solution files right now just in case something got screwy in VS, but I'll update to the latest code base and test that out as well.  I'll keep you posted.

EDIT: The specific debug report says "Cannot contact Slick Upload handler at /SlickUpload.axd".