Database Engine Tuning Advisor - E000 SqlServer Errors

Does anyone know how to DTA to correctly read the output from the Profiler?

I get the error:

TITLE: DTAEngine
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50% of consumed workload has syntax errors. Check tuning log for more information.

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BUTTONS:

OK
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And the log is full of lines like:

E000 SELECT COUNT(*) FROM   Pictures WHERE  AdRecId = 16329    2 [Microsoft][SQL Native Client][SQL Server]Invalid object name 'Pictures'.

E000 exec GetAd @RecId=15282   8 [Microsoft][SQL Native Client][SQL Server]Could not find stored procedure 'GetAd'.

E000 exec GetAd @RecId=15385   4 [Microsoft][SQL Native Client][SQL Server]SHOWPLAN permission denied in database 'xxx'.

Does anyone know what causes this?

I do have showplan permission on the login I use for tuning.