Frames not always working

[GreatG]

Hi all,

I'm trying to use the coolmenu on my site using frames. Everything works fine for the first menu item (at the left) or the second one. The page is opened and the menu keeps working. However if I open a page from the 6th item (Evenementen > Diner) the menu isn't visible anymore.

I stripped the opening page to just the basic content needed, so nothing is interfering with the menu.

http://users.pandora.be/GabrielsGert/GVV/GEiehome.html

Thx for your help!

Mvg,
GG