This was my problem exactly a few months ago. I was desperate since I could find anything that I possibly could have done wrong. And I had downloaded and installed it so many time I was sure I couldn't have a corrupt download or a faulty install each time.

It was eventually this thread that saved me
http://www.twcenter.net/forums/showthread.php?t=100384
Especially number 2 (which is explained lower in the thread) helped me out.
And now I can enjoy EB! And what an enjoyment it is!

Good luck!