Column chart in BO dashboard using BW query as source

Hi Gurus,

I am new to BO dashboards. Currently we are on BO 4.1 service pack 5 patch 1.

I am trying to create a basic dashboard where in my source data is SAP BW query.

Step 1:

I created a BW query with Fiscal year/Period, Profit center, MGH3 and Amount.

Step 2.

A. I created a Query in Query browser (BO) with just Fiscal year/period

B. Created query in query browser (BO)  with just Profit center

C. Same way created query with MGH3 ,Amount AND in prompts I gave fiscal year/period and Location.

Now in Canvas

I used two combo boxes, one for fiscal/year period and other for Profit center. Now in properties of combo box,

Fiscal year period

Profit center

Mapping of query browser properties in spread sheet

Now column chart properties

In preview, when I select values in the combo box, my values doesn't change. Your help is really appreciated.

Thanks

Sri