Nothing appears after first postback

Hi All,

I have developed an application. I works as desired using asp.net development
server (for example while debugging or when you give something like
localhost:<port>/Default.aspx)

But the problem starts when I try the same with localhost/Default.aspx that is
using IIS. (I am using windows XP)

Following is the problem:

After login the required page is shown. Now if I select anything from dropdown
list there is post back and then nothing will come up.

I waited for 5 min, but nothing.

Please help me.

tingu:After login the required page is shown. Now if I select anything from
dropdown list there is post back and then nothing will come up. 

What code do you have in the SelectedIndexChanged event of the DropDownList?

Thanks

it runs a sub to populate other dropdown lists. in fact even if i click a butoon
or anythis that causes postback it will not show anything. While the same code
will run perfectly while using asp.net development server on the same machine. 

I am new to this...

Ok...

There seems to be some problem with IE7 as this application works on firefox
using localhost/default.aspx.

Now I will have to find out why it is giving problem in IE7

You may need prevent the postback from firing unintentionally during postback. 
On your form_load, put the code below:

if not ispostback

  ' your code goes here

end if

Can we see some code?