Reports using customized Workitems

I′m tring to custimize the MSF Agile Process Template.

I′ve added fields to the WorkItemDefinitions (like Role) and also added new WorkItemDefinitions with new fields.

My problem is this:

Now i want to generate Reports for the WorkItems, using the new fields in the query.
for example:

"Tasks by Role".

where Role is a customized field.

Is it possible to do this, using the "TfsOlapReportDS" and "TfsReportDS" datasources ?

Thanks a lot.

[504 byte] By [jalekz] at [2008-3-7]