Interactive sorting and paging not working together in ssrs 2005

Question

Hi,

I have created a report and grouped by one column so that if you expand that group you can see that details rows.I provided interactive sorting on the summary columns which is working fine. My problem is that when I add another grouping on top of my existing grouping to provided the page break say for 15 rows then paging works fine but interactive sorting stops working. When I remove this grouping then interactive sorting starts working but i lose my pagination.

Any solution ?