[Mediawiki-l] CSS problem: adding new classes don't work

[Ashami]

I'm running the latest wiki and it's doing fine. I want to be able to 
add CSS classes so I can play with certain page layouts using the 
editing function. If I use a simple tag, like a DIV, and use an 
existing class in the .css file (say, in the main.css file for 
Monobook), it works just fine. But if I create a new class in the same 
file (and yes, I'm scripting it right), the DIV does nothing. It's like 
it won't read unique classes in the .css file. Any ideas how to get 
around this?