Grouping with Progressive loading

[satyag]

Hi All,

I have tried the dynamic grouping with putting these two methods
countryGrid.setGroupStartOpen("all");
countryGrid.setGroupByField("continent");
It is working fine.

And also done the progressive loading with the
countryGrid.setAutoFetchData(true);
And it is also working fine.

But when I set these three methods with the countryGrid then the progressive loading is failing while scrolling down the scrollbar.

I have debug the code then I found that by default the component is fetching the first 1000 records and grouping within that records.

Please help me to find that is there any way to grouping with the progressive loading.
Or do I need to use the pagination for certain group like 'A-D' and 'E-H' and when the user selects any of the particular group then within that group the application will fetch the records and show the records in the listgrid.