SSIS debugging on 64

Problem: When I debug my SSIS package (which imports an Excel-sheet into SQLServer) on a 64-bit server, I get this errors:
[Excel Source [9]] Error: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "Excel Connection Manager" failed with error code 0xC0202009. There may be error messages posted before this with more information on why the AcquireConnection method call failed.

[Connection manager "Excel Connection Manager"] Error: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80004005. An OLE DB record is available. Source: "Microsoft JET Database Engine" Hresult: 0x80004005 Description: "The Microsoft Jet database engine cannot open the file ''. It is already opened exclusively by another user, or you need permission to view its data.".

Cause: There is no 64 bit driver for excel. The workaround is to run the package using the 32 bit version of the execution utility.

Solution: Project Properties->Degugging Section, I set Run64bit RunTime to False.