Trouble changing the width

[Tereadia]

Hello,

I'm using the Purple Lily template and I've changed a portion of the stylesheet from:

/*wrappers - page or section containers*/
#mainWrapper {
background-color: #EEDDFF;
text-align: left;
width: 720px;
vertical-align: top;
}

TO
/*wrappers - page or section containers*/
#mainWrapper {
background-color: #EEDDFF;
text-align: left;
width: 850px;
vertical-align: top;
}

But the width hasn't changed. Is there anywhere else I need to go to change the width of the overall template? Is there an override somewhere in the admin panel preventing me from widening it?

Thanks for any help you can offer!!

[Tereadia]

Ok I managed to get it wider by messing with the em components of this section, but now the whole template kind of leans to the right, can anyone tell me how to shift the entire store to left?

Thanks,