I am ignoring the " I am always ignored" part of your post because I do not feel you are.
To log out of the DIS you have to clear your cookies:
in IE
Right click or left click( which ever way your mouse is set up) on the IE big E symbol
then under the general tab delete browsing history -temp files and cookies
Also we (the Moderators) would like to ask that you do not make another ID on the DIS VMK boards as it is really against DIS VMK board guidelines and it makes the moderators job so much more difficult monitoring all the multiple ids being used.
You can make another ID if you inform everyone of the change, but that would defeat the purpose of you trying to make others think you are someone you aren't.