Control working very late...

Question

well! m having an issue with my code in which m using RadioButtonList and on its SelectionChangedEvent i hv made a  <div> visible and a <div> visible=false like   

if (chk.SelectedIndex == 0)

{

divmain.Visible = true;

divcompany.Visible = false;

}

 in aspx this RadioButtonList,divcompany and divmain is under UpdatePanel

 

 ITS WORKING FINE On Local but not working on server when i select radiobutton the divmain becomes visible after 3-5 mins

 

so plz help me in this ....