I keep getting logged out!

[dmars]

I keep an Internet Explorer window open with WOA Forum.
Then I use PC to get on with my work through the day.
When I come to have a look later in the same day (about an hour) then I have been logged out...

Any ideas?

Cookies are enabled and I am using IE 7 on a laptop

[JayT]

There is a time out to log inactive users off after a defined period of time. This is usual on most Bulletin Boards.