Yes I did get you running. This problem can occur due to sequences of installations. The relationship between .NET frameworks and the IIS configuration can get whacked. You can save the following lines in a .bat file for future use: rem Register-Only Install of the framework, enabling extensions %windir%\microsoft.net\Framework\v2.0.50727\aspnet_regiis -ir -enable rem Remove any previous scriptmaps from the vsaWS web service %windir%\microsoft.net\Framework\v2.0.50727\aspnet_regiis -k W3SVC/1/ROOT/vsaWS rem Install scriptmaps for the vsaWS web service, recursively %windir%\microsoft.net\Framework\v2.0.50727\aspnet_regiis -s W3SVC/1/ROOT/vsaWS