SSRS 2008 - Change Group By Column Position

Hi,

I have created an report in SSRS 2008, in the report i have Tablix and i have created Group By column by below mentioned process.

Right click on the row -> Selected  "Add Group" - > Selected  "Parent Group" -> Select "Group By" with Some Column.

Now after groupping the Group By column came to 1st position.

I need to chage the position of Group By column from 1st to 4th can i do that?

thanks in advance..