I have an Silverlight site deployed to a Server running IIS 6.0 and the RadUpload works just fine. When we try to deploy the same site to a server running IIS 7.0 I get an error (Handler not found or execution of the handler failed) when trying to upload a file.
So I tried to access the RadUploadHandler.ashx directly through IE (http://..../RadUploadHandler.ashx and I get the following -
HTTP Error 500.21 - Internal Server Error
Handler "MyRadUploadHandler_ashx" has a bad module "ManagedPipelineHandler" in its module list
We recently switched to VS2010 and .Net 4.0 and this is the first deployment of a build since the upgrade. It worked previously on IIS 7.0 with .Net 3.5. and works currently with IIS 6.0 and .Net 4.0
I assume its something in IIS 7.0 and probably something I need to add in the Handler Mappings but I an not very familar with IIS 7.0 and don't know how to proceded.