Why do I keep getting logged off of the forum?

Almost every time, or every other time, I go to read or post on the forum I find I'm logged out. Not a huge issue, but it is as annoying as it is unnecessary.

Please don't tell me to clear my cache or TIF or something like that... this is the only forum that's open in a tab on the same browser window with all the other forums I peruse daily that logs me off consistently.

I click the remember me button when I log in and it never does... what makes this happen on just this forum?

Thanks.

Check your browser settings, particularly if you or an automatic setting prevents accepting cookies or clears them out upon exiting the program.

Can't see anything to suggest that's the case, and as I said, I have seven other car forums up in tabs in the same window... this is the only site that constantly logs me out.