IE cookie problem
 

I'm not sure what I did, but now I can't stay in my forum in IE. It appears that IE is rejecting the cookie. I can get in and stay in using Firefox and Chrome, but with IE, once I log in, and it accepts my login, it tosses me out and asks me to log in again. I've checked IE and I don't seem to be having problems with cookies generally. For example, I'm using IE to post this message. The problem seems to be some issue between my site and IE. Any ideas or suggestions?

Thanks