Marketpress Help

Ok I'm not a coder and have only been using WordPress a year and a half It's Brilliant. Now I installed Marketpress Followed instructions to the letter a month ago, there is what I assume is a light box or something, it does nothing, I have read through the code and searched for answers, I want it to do something or just get rid of it. Not even sure if it is Marketpress related or it is coded in my theme somehow( although its never presented itself on any other page of my site) Any Suggestions?!