RE:XWin works on Win2K but not on some WinXP clients

["Woellert, Kirk D." <kirk dot woellert at ngc dot com>]

I tried the command:

XWin -query <linux-box-ip> -from <window-box-ip> 
No luck.
BTW, is there more to do on the client side than merely install the full
Cygwin (and hence full XFree86 package)? Again, maybe I missed something.
Here is the log file from one of the WinXP machines. FYI, the guy that can
connect has the same hardware configuration, he just happens to be on Win2K.
I see some msgs that look funny, but nothing that I recall from the docs
that point to an issue.

ddxProcessArgument - Initializing default screens
winInitializeDefaultScreens - w 1280 h 1024
winInitializeDefaultScreens - Returning
OsVendorInit - Creating bogus screen 0
_XSERVTransmkdir: Owner of /tmp/.X11-unix should be set to root
(EE) Unable to locate/open config file
InitOutput - Error reading config file
winDetectSupportedEngines - Windows NT/2000/XP
winDetectSupportedEngines - DirectDraw installed
winDetectSupportedEngines - Allowing PrimaryDD
winDetectSupportedEngines - DirectDraw4 installed
winDetectSupportedEngines - Returning, supported engines 0000001f
InitOutput - g_iNumScreens: 1 iMaxConsecutiveScreen: 1
winSetEngine - Using Shadow DirectDraw NonLocking
winAdjustVideoModeShadowDDNL - Using Windows display depth of 32 bits per
pixel
winCreateBoundingWindowWindowed - User w: 1280 h: 1024
winCreateBoundingWindowWindowed - Current w: 1280 h: 1024
winAdjustForAutoHide - Original WorkArea: 0 0 994 1280
winAdjustForAutoHide - Adjusted WorkArea: 0 0 994 1280
winCreateBoundingWindowWindowed - WindowClient w 1274 h 962 r 1274 l 0 b 962
t 0
winCreateBoundingWindowWindowed -  Returning
winCreatePrimarySurfaceShadowDDNL - Creating primary surface
winCreatePrimarySurfaceShadowDDNL - Created primary surface
winCreatePrimarySurfaceShadowDDNL - Attached clipper to primary surface
winAllocateFBShadowDDNL - lPitch: 5096
winAllocateFBShadowDDNL - Created shadow pitch: 5096
winAllocateFBShadowDDNL - Created shadow stride: 1274
winFinishScreenInitFB - Masks: 00ff0000 0000ff00 000000ff
winInitVisualsShadowDDNL - Masks 00ff0000 0000ff00 000000ff BPRGB 8 d 24 bpp
32
winCreateDefColormap - Deferring to fbCreateDefColormap ()
winFinishScreenInitFB - returning
winScreenInit - returning
InitOutput - Returning.
MIT-SHM extension disabled due to lack of kernel support
XFree86-Bigfont extension local-client optimization disabled due to lack of
shared memory support in the kernel
(==) winConfigKeyboard - Layout: "00000409" (00000409) 
(EE) No primary keyboard configured
(==) Using compiletime defaults for keyboard
Rules = "xfree86" Model = "pc101" Layout = "us" Variant = "(null)" Options =
"(null)"
winPointerWarpCursor - Discarding first warp: 637 481
winBlockHandler - Releasing pmServerStarted
winBlockHandler - pthread_mutex_unlock () returned
winDeinitClipboard - Noting shutdown in progress
winDeinitMultiWindowWM - Noting shutdown in progress
winDeinitClipboard - Noting shutdown in progress
winDeinitMultiWindowWM - Noting shutdown in progress
winDeinitMultiWindowWM - Noting shutdown in progress
winDeinitClipboard - Noting shutdown in progress
winDeinitMultiWindowWM - Noting shutdown in progress