I just installed Fedora 12 on my computer, and i have a problem. Compiz isn't running properly. It's not responding to changes that i make in the CompizConfig Settings Manager

The cube runs and the wobbly windows work fine.
Am i doing something wrong? I installed Compiz and Emerald. And enabled it from the Desktop Effects menu, but when i change some settings it doesn't respond. My graphics card is Intel, don't know what model.
Can anyone help me?