Error Generating model for Olap Data Source

When I try to generate a data source for the TfsOlapReportDS in Report Manager I get the following error:

An error occurred while generating model. (rsModelGenerationError)Get Online Help An error occurred during the generation of semantic model : [Create mapping between cube dimensions and database dimensions]Unexpected error occurred : Schema indicates that cube dimension '[Team System].[Agent Machine]' is based on dimension 'Machine', however, the entity representing 'Machine' cannot be found.. [Create mapping between cube dimensions and database dimensions]Unexpected error occurred : Schema indicates that cube dimension '[Team System].[Agent Machine]' is based on dimension 'Machine', however, the entity representing 'Machine' cannot be found. Unexpected error occurred : Schema indicates that cube dimension '[Team System].[Agent Machine]' is based on dimension 'Machine', however, the entity representing 'Machine' cannot be found. Any Ideas what this might be? Thanks

[2192 byte] By [BryanNate] at [2008-2-4]