joomla 2.5 filter,sort,pagination combination

joomla 2.5 filter,sort,pagination combination

I've developed joomla frontend data table with paging, filtering and
sorting. Pagination works. Column sort alone works too. But as example
when I sort a column by name, and then go to page 2 (or any other) it
shows me the choosen page without the sort. The sort is just disappeared.
This is the same with every column.