Firefox problem

[sjerabravo]

Hello,

I am new in web design and still working with a book by my side. I am having problems with my web page in Firefox. In IE everything is on its place but in Firefox my navigation buttons are missing. I did my design in Photoshop and navigation buttons as well. Everything except buttons is OK. It is pretty simple design and I don't understand why I am having this problem.

If someone could give me some advice it would be great.