Sessions Number Keeps Increasing

I am facing a small problem. it seems that the server the asp is residing on does not hold the session data and pass to the client. what i did was to do a write session id . something odd came about. When i kept refreshing the page, the number kept increasing. why is that so ?

if i test that same thing locally it the session id number was the same even though i kept refreshing the page. i have tried reinstalling IIS on the windows 2000 server machine, but to no avail.