reporting services 2005 html & render

[MaddogC]

I am using reporting services 2005 to display an report in an asp.net app.

I need to impersonate another user to get to the reports and have therefore used the following web service code.

Dim rs As New ReportingService
rs.Credentials = New NetworkCredential("User", "pwd", "domain")

Can I use URL access once I have impersonated another user using the web service. How do I do this? If I redirect to the URL it simply uses my old NT user account.