gnome dead

[YOUDI]

this is xsession error log

GNOME_KEYRING_SOCKET=/tmp/keyring-QX8ARZ/socket
SSH_AUTH_SOCK=/tmp/keyring-QX8ARZ/socket.ssh
GNOME_KEYRING_PID=4564
gnome-session[4509]: WARNING: Could not launch application
'gnome-do.desktop': Unable to start application: Failed to execute child
process "gnome-do" (No such file or directory)
** Message: adding killswitch idx 0 state 1
** Message: killswitch 0 is 1
** Message: killswitches state 1
** (bluetooth-applet:4610): DEBUG: Unhandled custom UUID
00000004-0000-1000-8000-0002ee000002 (0x4)
** (bluetooth-applet:4610): DEBUG: Unhandled UUID
0000111b-0000-1000-8000-00805f9b34fb (0x111b)
** (bluetooth-applet:4610): DEBUG: Unhandled UUID
00005005-0000-1000-8000-0002ee000001 (0x5005)
** (bluetooth-applet:4610): DEBUG: Unhandled UUID
00005557-0000-1000-8000-0002ee000001 (0x5557)
** (bluetooth-applet:4610): DEBUG: Unhandled UUID
00005601-0000-1000-8000-0002ee000001 (0x5601)

(bluetooth-applet:4610): GLib-GObject-WARNING **: invalid cast from
`GtkActionGroup' to `GtkAction'

(bluetooth-applet:4610): Gtk-CRITICAL **: gtk_action_set_sensitive:
assertion `GTK_IS_ACTION (action)' failed
** Message: killswitch 0 is 1
** Message: killswitches state 1
Failed to play sound: File or data not found

(polkit-gnome-authentication-agent-1:4630): GLib-GObject-WARNING **: cannot
register existing type `_PolkitError'

(polkit-gnome-authentication-agent-1:4630): GLib-CRITICAL **:
g_once_init_leave: assertion `initialization_value != 0' failed
Initializing nautilus-image-converter extension
Initializing nautilus-sound-converter extension
Argument is not int!
Message has no arguments!
Initializing nautilus-search-tool extension
Initializing nautilus-open-terminal extension
Intializing nautilus-pastebin extension...
Bazaar nautilus module initialized
Initializing nautilus-gdu extension

(firefox:5146): Gdk-WARNING **: XID collision, trouble ahead

(firefox:5146): Gdk-WARNING **: XID collision, trouble ahead

(firefox:5146): Gdk-WARNING **: XID collision, trouble ahead


................................

system :
 2.6.32.16-150.fc12.x86_64 #1 SMP Sat Jul 24 05:19:12 UTC 2010 x86_64 x86_64
x86_64 GNU/Linux

tell me how to do? I beg.....