Expanding menus width appears not to change with settings

[jetwbt]

Hi,

I am trying to use the expanding menus. They expand perfectly. The only problem seems to be that the styles to apply to each menu item ($um['menus']) width is consistently being ignored. I must be missing something as it seems to revert to the same value of about 120px. I have tried setting it to 200px, to 240 px, to 16em, even down to 50px, but none changed it from its current width. I'd like it to be at 240px, so the menus won't scroll down beyond the page break. The page I'm playing with is at:
http://www.taism.com/new_web/index6.php
Is there any other setting besides the width of each menu item I need to change?

Any help would be most appreciated.

Many thanks,

Brian