Go to your board, click on preferences, then click on the clear cookies link to clear the cookies. Then shut down all your open browser windows, and if you're using IE - reboot your computer. This procedure is pretty much foolproof for clearing any UBB set cookies.

Next time you go to your board a new cookie will be set based on the userid/password you use at that time.

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Doug
darksaber.hispeed.com
I am altering the deal. Pray I don't alter it any further.
--Darth Vader, The Empire Strikes Back