Asp Session

Server: Windwos 2000
IIS: 5

Hi,
In my web application the user can't access from more pc in the
site...
Every user have a password that are stores in the session
Every time they enter in the site i check their password in the
session
i handled the session with Application:

This is my global.asa


When user left the application with the logout button,
i make a redirect to this page:


Application.Lock

valori=split(Application("ActiveUsers"),"#")
infoutente=trim(Session("utente"))
if infoutente<>"" then
Application("ActiveUsers")=""
for i=1 to (ubound(valori))
if valori(i)<>infoutente then
Application("ActiveUsers")=Application("ActiveUsers") & "#" &
valori(i)
end if
next
end if

Application.UnLock

Session.Abandon


if the user doesn't use the logout button my global.asa delete
the user session

this work until the user that are in my site are 140/150,
but from the user are >180 this system doesn't work!

the session doesn't close after 5 minutes!
why?

thenk you and sorry for may english!