Report Manager - Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'

Hi,

I created a report in BIDS (VS 2008) and had to update it with new columns/stored procedure, so I created a copy to update and save.

The problem is, when we try to execute the updated copy (same data source/new SP) from REPORT MANAGER, we get the following message:

• An error has occurred during report processing. (rsProcessingAborted)
  • Query execution failed for dataset 'usp_Get_BBSA_Raw_Data_Changes_WithClosestReportDate_V3'.       (rsErrorExecutingCommand)
      
    • Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.

It executes just fine in BIDS.

I hear and I forget. I see and I remember. I do and I understand.