Sabayon 7, Shell Theme error

[Jimmys13]

Hello there!

I've been testing Sabayon 7 to my main PC along with Fedora 15.

With my new installation of Sabayon 7, I can say that I am pleased with the functions of this new distro.

I have a problem with gnome-shell theme.
The themes cannot be loaded and the message (when I put cursor over the error mark at advance settings)
" Shell user-theme extension not enabled"
appears.

Is there a problem with graphics card drivers?
I have GeForce 9400 GT/PCI/SSE2 drivers at this moment.
I do not want to remove them for some games I want to play later.

Any ideas how can i remove this error and load my themes?