XWin error

[JaaMaaN]

I can't start XWin. Why?

Created error log.
================================================================
Welcome to the XWin X Server
Vendor: The Cygwin/X Project
Release: 6.7.0.0-7

Contact: cygwin-xfree@cygwin.com

XWin was started with the following command line:

X :0 -multiwindow -clipboard 

ddxProcessArgument - Initializing default screens
winInitializeDefaultScreens - w 1280 h 1024
winInitializeDefaultScreens - Returning
_XSERVTransmkdir: Owner of /tmp/.X11-unix should be set to root
winValidateArgs - g_iNumScreens: 1 iMaxConsecutiveScreen: 1
winCheckDisplayNumber - Cygwin/X is already running on display 0

Fatal server error:
InitOutput - Duplicate invocation on display number: 0.  Exiting.

winDeinitMultiWindowWM - Noting shutdown in progress