Button on Navbar freezes on webpage - rest of navbar locked up

[mvssysprog]

Hi...

I am nearing (I think) the completion of my first website. I changed my navbar to another form. After setting the bar up, up and customizing all of the links, I loaded it out to my webhost. I discovered when I click 'upcoming events', it goes to that web page, but then the navigation bar locks up and I can't select any other options on the bar. I am including a screenshot of the header page, and other pertainent (I think) screenshots. My website is www.stoppersnstuff.net. the same thing happens when i select 'preview website'. Can anyone suggest what I have done to cause this?

One other question... How do I change the color of the text in the navigation bar?

Many thanks in advance.

Dave