Safari -- How to Add More Favorite Item Icons to the ToolBar?

When I try to add more favorite item icons to the toolbar, it only allows me
to add up to 5-6 icons, more than that, instead of pushing the address box right, it just pushes the existing icons left, the new added icon just replaces a previous added icon...
How can I make it shorten the address box and the search box to make more space for favorite icons?

Please see the picture.

I know it's weird because I asked one of my friends who uses Mac, he could added as many as icons he wanted...

I'm using a MacBook Pro, just got it 10 days ago, it should have the latest version of Safari, I just checked, it V 2.0.4 (419.3), the MacBook was manufactured this year, yes - 2007.

OK, just make sure again I'm doing it correctly:

1. Right click on the toolbar, then click the "Customize toolbar..."
2. Drag and drop icon from the pop-up windows to toolbar...

Got it

OK never mind, I know what's going on now.

Actually I CAN add all icons to the toolbar, the problems was, as a Windows user, I got confused on the "Stop" and "Reload" icon -- They are the SAME icon in Safari, just in toolbar, because there is no page loading, it shows a "Reload" circle while the icon on the small pop-up windows shows a "cross", so I thought they are different command icons... Indeed, they ARE different icons in both Windows IE and Firefox.