Problem with Select Filter value.......

HI all

We have created a report on Sales cube,and Inserted the Report into work book.

In the report we have 2 Commission codes 1.Customer,2.material.

when we are trying to select filter values for customer Commission code,we are Gatting the Pop-up window but the system is Getting hanged, it is not showing any values also.

We thought it is a Bex problem, but when tried other reports it is working fine.

Suggest me any possible solution to resolve the issue

Thanks in advance