Dynamically Centered CSS Menu ... and Problem!

[axxn]

Hey guys, I've created a dynamically centering nav bar with drop-down menu, but i can't get the sub-menus to align to the correct spot (they appear off on the right of the list item, not underneath).

Here is my HTML + CSS code (http://webcanada.com/test5.html)

Any suggestions would be GREATLY appreciated.

Thanks.