Drop down Menu on Firefox

i have a dropdown menu on my site and it works beautifuly in IE but when i opened the site in firefox, it turned out to be a "no show"...

how could i make it "cross" to firefox?

site is:
http://www.worldpartner.com/test/html/hjem.htm

pls help

 

I use this http://css.maxdesign.com.au/listamatic2/ to create menus using CSS that work in I.E. and Firefox

 

Yes that works for list though... but i need a dropdown vertical menu...

thanks for now i know how to do nested list...

http://www.worldpartner.com/test/html/hjem.htm

 

If you look around on that page you will find some that have dropdown menus.

 

thank you... although what i have learned form that site is css and hovering list of links... i had it mixed up with some simple codes and now it really works. I wont be able to do that if you haven't posted that website... thank you very much... i owe you big time...

 

I always use mygosumenu. Horizontal or vertical drop down menus which work across all browsers