Xserver can not be start! help!!!

[users]

今天早上一开机，Xserver就不能启动
蓝屏上有这样几行字
GDM：Xserver not found：/usr/x11r6/bin/X :0 -br -audit 0 -auth
/var/lib/gdm/:0 Xauth -nolisten tcp vt7
Error:Command could not be executed!
Please install the X server or edit /etc/gdm/gdm.conf to point right place


怎么修改gdm.conf？

谢谢！！！

[eexpress]

$ ls -l /usr/X11R6/bin/X
-rwsr-sr-x 1 root root 7508 2005-10-11 02:10 /usr/X11R6/bin/X
看看属性对不。