Try closing all web browser windows or even restart your computer, then launch web browser again, this should help. Most likely new web browser reused existing instance and didn't become anonymous. Please make sure that no other application instances are started before launching application under the program and try again. This is applicable for FireFox, for example.
How to unban myself from web site or forum? Try the following: 1) Clear web browser cookies (in Internet Explorer 7, use Tools | Delete Browsing History command, in Internet Explorer 6, use Tools | Internet Options...