Login failed for user '(null)'

Hi.

Im trying to make a couple of reports online for other people. My current setup is:

Machine A: SQL05 server.
Machine B: ReportingServer05 and IIS 5.0 (XP machine).
Machine C: Client trying to connect to Machine B and view a report. (Windows 2003)

On Machine B everything is working just fine, i can view my reports without any problems.
But if i try viewing a report on Machine C, I get the following error:

An error has occurred during report processing. (rsProcessingAborted) Get Online Help Cannot create a connection to data source 'IntegrationDB'. (rsErrorOpeningConnection) Get Online Help Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
But machine C kan browse http://machine-b/ReportServer and se the list of reports hosted, its when trying to generate the reports there is a problem. Im logged in on machine C with the same user as on Machine B.

My Shared Data Source in this VS05 project is setup to be using Integrated Security, so the "user '(null)'" part looks like Machine C dosnt supply the username, but why?

What is it that im missing in my configuration?
And any addional information needed?

Best Regards.
Lasse Stig Thomsen

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You are running into a double-hop issue. Make sure Kerberos is enabled and configured correctly (the "real" solution").

Another thing you might try (not really a fix, but avoiding the problem) is to hard-code the credentials in your data source versus using Windows Integration.

|||Hi thanks for the answer. It worked like a charm with both solutions.

thanks gain.