slackware9.1 gnome2.4.1中，root用户怎么用屏幕保护啊？

pingY

The XScreenSaver daemon doesn't seem to be running on display ":0.0".Launch it now?
每次设置屏保都出现这句，OK后
Error:
The xscreensaver daemon did not start up properly.
You are running as root.  This usually means that xscreensaver
was unable to contact your X server because access control is
turned on.  Try running this command:
xhost +localhost
and then selecting `File / Restart Daemon'.
每次都要运行xhost +localhost才可以。
而且lockscreen不能用
xscreensaver-demo:locking not enable