SSIS Lookup Task is running endlessly.

Hello,

I have a Problem. At our SSIS package we have a lookup task running on full cache mode and finds no matches. It runs endlessly and doesn't fail, allthough it's configured at this case.

SQL Server (SSMS/SSIS/SSAS) is running on a virtual machine with windows server 2012 and SQL Server 2012 built 11.0.5058. 

Does anybody has/had a similar problem and solved it?

Thanks,

Thomas