update panel stops navigation to first page..

See more:

ASP.NET

Hi
when i use update panel with datapager OnPreRender function , and when i click om navigation for exp..

1 2 3 4

i show 25 products on each page,
on first page it shows 1 to 25 ,
when i click 2 , it shows 26 to 50,,,
then again if i click on 1 , it does not show 1 to 25 , instead it shows 26 to 50,,,(it remains on same page)

then if i click 3 , it shows 50 to 75 ...

then again if i click on 1 , it does not show 1 to 25 , instead it shows 50 to 75,,,(it remains on same page)

pls advice