Log On Problem

Hello everyone, my name is Dave know as davebax. When I go onto wincustomize and log on all is well. As soon as i go to the forum I'm no longer logged on and have to do it again. This started about a week or two ago. Also even after i'm logged on there are adds on the pages. They look like add sense adds from Google. Maybe they have been there all along and I haven't noticed them till I have to keep logging back on. Aslo haven't been able to change my desktop screen shot on my web site for at least two weeks.