Paul,

It should be firing when the session expires.

>>Hi Paul,
>>
>>There is a way to trap when a session timesout. In your Global.asax file, there is a Session_End event handler that allows you to provide code to run when your application explicitly closes the session or when the session times out.
>>
>
>Does it fire as soon as any session expires or does it require the user (who's session has just expired) to hit the site?