Login failed

I get this message using windows authentification. Any Ideas?
Reporting Services Error
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An error has occurred during report processing. (rsProcessingAborted) Get
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Cannot create a connection to data source 'NKRIM105_DB'.
(rsErrorOpeningConnection) Get Online Help
Login failed for user '(null)'. Reason: Not associated with a trusted SQL
Server connection.
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If you wait for an opportunity the opportunity will pass u by!Hi,
1) Please give your user approperiate access to database by add user to
database you are attempting to connect.
2) Your user must have appropriate access to reports deployed at report
server. Goto Report manager and add above user
Regards,
Ayaz Ahmad|||Hi,
1) Please give your user approperiate access to database by add user to
database you are attempting to connect.
2) Your user must have appropriate access to reports deployed at report
server. Goto Report manager and add above user
Regards,
Ayaz Ahmad