Can't Post to Countdown Site

I am unable to post to the Countdown web site because after I login and go to the site, I am no longer logged in! When I try with FireFox, the login screen doesn't even come up. I use Internet Explorer 8 and Windows XP Pro. All updates are current. I have a 2.71 GHz AMD CPU with 1.93 GB of RAM. My user name is iowahillgal. This is the second time I have reported this problem. Please help! I want to participate.
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