Session timeout problem

[Guest]

I have some code in the Session_End event, that deletes certain records from
the database, when I run the site locally the session timeouts and the
records are deleted, but when I have uploaded the files to the server &
tested it online, the session seems to never timeout and the records are not
deleted from the database.

Are there any reasons that prevents the session from timeout?
I have uploaded the same Web.Config file I'm using locally with session
timeout = 1 min and yes I have restarted the application on server but still
nothing happens.