When I log in the forums, After sometime it doesn't remember me and logs out even though I checked remember me.
Is this a cookies problem?

if you uses annonymous mode on you browser,doesnt work.

I dont use anonymous mode in my browser because why should i?

Its probably a cookies problem you have to turn them on
Also what browser are hou using?

I use firefox.

I use firefix also and am not having this problem im guessing you just turned cookies off or aren't clicking the remember me box?

I Did remember me but how do i enable the cookies?

Click Tools > Options.
Click Privacy in the top panel.
Set "Firefox will:" to Use custom settings for history.
Check the box next to "Accept cookies from sites" to enable cookies.
Click OK.

thats strange.
The cookies are accepted and everything is okay but what about keep until option, seems suspicious to me.
the keep until option got "keep until:They Expire or until I close my browser"
does this have any relation to my situation?

Tools > Options > Security > Check the box "Remember logins for sites"
Then, log with your toribash account.
Go to the options, and click "Saved Logins" to see if your login was saved.