Ok so here are a few things I noticed that were wrong with the code you posted. After I fixed these it did work in IE.
First your advertising div is missing a closing quote after the class name. Second your li's all are using the same name which is probably something you are aware of already since you said it worked in others. I would check the missing quote to start. Because like I said it is working for me.
spinon
2010-07-04 04:52:37