Fedora 17 login problem !

[eaglelinux]

Hello !

When I try to login in Fedora 17, I take an ERROR that recommend me to logout:

No system tray detected on this system.
Unable to start, exiting.

Oh no ! Something has gone wrong.
A problem has occurred and the system can't recover.
Please log out and try again.

And now i can login only in Fallback Mode but in GNOME 3 Mode, I can't because I take above error.

How to solve this ?

Thank you !

[hadrons123]

Your 3D accelaration is disabled.
What graphics card are you using?

[eaglelinux]

00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express Integrated Graphics Controller (rev 02)]

[eaglelinux]

Any solvation type for this problem ?