I can not log into the forums to another site! Need Help! [windows 98 se] [windows 98]

Q: First of all, I am not banned. I checked. :) I thought it was a problem with Windows 98 SE, since I just reformatted and downgraded Windows ME. Ive formatted and reinstalled Windows 98 SE. It still does not work. I ran away fully IEradicate and Internet Explorer, and again from zero. It still does not work. Ive tried using Opera, in case it was a problem with IE in general, and still no go. I have not done again reformat reinstall Windows ME and it does not work! : (I enter my details to log