Errors with all reports on Project Portal page

I just created a new team project. From the context menu of the new team project, I chose "Show Project Portal". All three of the report panes contain error messages similar to:

An error has occurred during report processing. (rsProcessingAborted)
Cannot impersonate user for data source 'TfsReportDS'. (rsErrorImpersonatingUser)
Logon failed. (rsLogonFailed)
Logon failure: the user has not been granted the requested logon type at this computer. (Exception from HRESULT: 0x80070569)

Clearly something doesn't have permission for something. But what use is trying to access what resource? What permission is missing? How can I tell?

[696 byte] By [CarlDaniel] at [2008-2-4]
# 1
Solution: In my case, the data tier was installed on the domain controller for the AD domain. The default local policy doesn't allow non-admin users to log in. Changing that policy to allow the TFSSERVICE user to log in corrected this problem (and showed me the next one...)
CarlDaniel at 2007-8-21 > top of Msdn Tech,Visual Studio Team System,Visual Studio Team System - General...
# 2
I assume your next problem is..."Unable to locate control: ctl00oReportCell"

How in the world was Beta 2 released with all these problems? I can't believe so many people signed off on it.

AdamTatusko at 2007-8-21 > top of Msdn Tech,Visual Studio Team System,Visual Studio Team System - General...

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