Getting “The WebResource.axd handler must be registered in the configuration to process this request.” error

Question

I\'m getting this error while running my ASP.NET app on IIS7. I\'ve tried doing what it says to do but it doesn\'t help.

The WebResource.axd handler must

Answer 1

I got this error after carelessly copying my app's web.config between a pair of clustered servers, which overwrote the tag:

with

Locating the proper ID as per Josh's response and correcting the tag fixed it, but more importantly, will presumably keep that handler mapping from sneaking back in.