Failed to Execute URL Exception when on windows 2003 relying party with IIS 6

Hi Guys,

I am getting an exception when deploying a passive relying party on windows server 2003 and IIS 6. "Failed to execute URL" Exception.

This happens when i include the WIF SessionAuthenticationModule and WSFederationAuthenticationModule http modules. We have wildcard application mapping in IIS 6 that points to aspnet_isapi.dll, this is used to extension less http handlers. Everything works as expected if i dont include the modules. Also if i take out the wildcard application mapping i dont get this specific exception however the custom http handlers dont work.

My question is, is there anything in the WIF modules that i mentioned above that might cause that, and is there something i can do to fix it.

Thanks