I'm using webforms with UrlRewriting.Net to rewrite pages, e.g.

http://www.example.com/stuff.aspx?c=30
becomes
http://www.example.com/stuff/30-this-stuff.aspx.

It works in so far as the correct content is loading; however, none of the postbacks are working (mostly buttons on the page). If I set up a breakpoint on Page_Load, I see that IsPostBack is always false. Any ideas on how to fix this? Right now I'm just on Visual Studio 2008.

EDIT: I have since switched to UrlRewriter.Net, which worked after a few tweaks (see Scott Gu's article). Besides here, I have posted my original problem to the developer's forum: if I ever get an answer, I'll post it here (unless else posts it here first).