Main Table Width wont work

[J_Chem]

Hey guys.

Any idea why this wont work for me?

I want to change my Main Table Width to 90%
So I go to Style Manage > StyleVars and change the value to 90%.. but nothing changes.

It does not change for any value i put in.

The only other thing I have installed is vbadvanced. and I'm using vBulletin Version 3.5.4

thanks for any help

EDIT: just noticed that it is changing some things:
On my main page only the bottom bar (the one with contact us, admin, mod etc) is going to 90%. everything else is 100%

each forum/sub forum is still 100%

the actual thread pages are at 90%

any help is greatly appreciated=)