Topbar View

I'm replacing the profile, friends, mail, and settings icons in the topbar. My custom icons are width: 47px, and height: 31px. As I said earlier, I have created a sprites of these 4 icons with 2px between each. Now, I have changed the widths and heights in the layout.php, navigation.php, and admin.php of my custom plugin to change the dimensions of the topbar (to accommodate my icons), but, even though my custom icons appear, they're being stacked on the left side of the screen. What am I getting wrong or which parts of the CSS should I change? I have enabled the wrap feauture and I'm using Firebug's inspect. Thanks.