Report with two OLAP queries

Hi

I am using Business Objects 4.1. I have two universes based on SSAS Olap cubes.

I am trying to create a Web intelligence report with two queries, each of them from one of the Olap based universes. When I create the first query and run, everything is fine. However if I add a second query and run, only the first report has data.  Does anyone know why?

Thanks

Teresa