What I have right now in my Application_Error is this:

string ErrorDescription = Server.GetLastError().ToString();
string RedirectString = "Error.axpx?ErrorDescription=" + ErrorDescription;
Response.Redirect(RedirectString);
Server.ClearError();

I throw a new ApplicationException, and I get the default "Error in the application...An unhandled exception occurred" message, not the Error.aspx that I'm expecting. Obviously I want to do something more sophisticated, like log the error to an XML file or the windows event log or something, but I'm just trying to get this much working right now.

If it makes any difference, the debug mode is RemoteOnly.

Thanks, Bill.