Navigation Problem

I'm having a firefox navigation problem. the navigation doesn't work at all. the website is:

thinkcassis.com/ado

any suggestions?

Read http://www.codingforums.com/postguide.htm
1) Do not cross post your question in multiple forum categories- When posting, there is no excuse to post the same question in multiple categories in hopes of getting a quicker response. This is called spamming, and can get you banned. Choose one category that best accommodates your question, and post it there, once. If you're following up on a question, reply to the original thread, not start a new one! Everyone here is volunteering their time to help out others. The least you can do is make their jobs easier and less confusing.