[Plugin: Simple Facebook Connect] Custom CSS Code for fanbox ignored?

Hello,
I’m fairly new to wordpress and CSS and I’m trying to customize the fanbox using the simple facebook connect plugin. I’ve tried overriding the CSS using the Fanbox Custom CSS field in the Fan box settings with the following:

.fan_box .full_widget .connect_top {
    background: none repeat scroll 0 0 #EEEEEE;
}

The only change I made from the default is the background color. I’ve saved the change but it seems to be ignored. I can see the change using firebug so I know i’ve identified the correct property , but i’m not sure why the change doesn’t show after saving. What am I missing?
Thanks!

http://wordpress.org/extend/plugins/simple-facebook-connect/