Forms Authentication --&&> Redirect To Login Page

We've successfully set up SSRS with forms Authentication (yea - wasn't easy!)

If we browse to the default web site, we get the login page. Once we authenticate, we can move around the site and run reports.

If however, we try to access a page (other than the login page) while we're not authenticated we get an exception instead of being redirected to the login page:

Object reference not set to an instance of an object

Microsoft.ReportingServices.UI.GlobalApp.Application_AuthenticateRequest(Object sender, EventArgs e)

If we set the Reportmanagerweb.config file to use Windows authentication, we get a 401 Access Denied page instead.

My first inclination would be to override the Global.asax file for SSRS, swallow the exception and redirect to the Login page. Not sure how to do this since the Global.asax.cs page isn't in the folder (I assume the compiled version hidden away somewhere).


It's not just the intial login either, timeouts are especially frustrating because, instead of being redirected to the login page, the users get the exception.

Any idea what might be causing the exception in the first place?

Thanks!
Mike