logging in again and again

[rusty rider]

I'm having to log in multiple times in the forum's. I have to log in when I get here, if I reply to a post I will have to log in again. I have clicked on the box that say's log in me in automatically each time to no avail. I have been having this problem just since the new format. I can scroll down to the bottem of the board index see that I'm online, but as soon as I post I'm sent to the log in again.

Sorry for the long rant it isn't killing me, just perplexing me O_o