Publishing Crystal Report to SAP BW with non BW Datasource

Hi,

I have a report which contains a BW and an SQL Server Datasource. If I want to save and publish this report to SAP BW i get the error "An error occirred while saving / or publishing. The return code 6 was returned from the server. An error occurred while trying to open the report"

The question i have is this becuase the reprot contains a non BW datasource (i.e. SQL Server) or is it something else?

Cheers,