BaseDisplay::BaseDisplay: connection to X server failed.

[modesty]

All members of Cygwin-XFree mailing list,

I tried the following commands but X server shutdown with error.

~# cp /etc/X11/xinit/xinitrc ./.xinitrc
~# vi .xinitrc 
(deleted all lines under the comment # start some nice programs and added 'openbox &')
~# startx
waiting for X server to shut down BaseDisplay::BaseDisplay: connection to X server failed.

What does this error mean? I've searched on http://www.google.com which shows compilation error involved with BaseDisplay.o or something unrelated to my case. Any gleamy light shed upon this sort of uncertainty?