Hmm well I can't get mine to load at the moment to see what the problem might be. (i'm at work and work's pcs are foobared)
You could be running a popup blocker of some sort that might do it, also check things like activex controls and things.
If you are still having problems i suggest you contact microsoft support, they get back to you in a few days and are very useful whenever i've dealt with them.
Good luck
