Moving one button to align right.

Hey all,

I’m trying to get one button (The last on the menu) to align right and sit by itself justified right. The code:

#menu-item-14 {
float: right;
}

Doesn’t work as it has for me on other sites. I’m certain this is me and me being rusty but is there a particular way to get the wonderful Mantra theme to enable this?

Thanks in advance for any and all assistance with this!

-m0r