X session over LAN errors

[Alasdair Reed]

Hi,
I am trying to open an X session over a LAN, the connection via ssh works fine however I get  an error message when  I try to open an X application on the remote machine

debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: Requesting X11 forwarding with authentication spoofing.
Last login: Wed Nov  5 10:29:41 2008 from 192.168.0.6
NetBSD 3.0.1 (GENERIC) #0: Thu Jul 13 23:43:47 UTC 2006

Welcome to NetBSD!

$ xclock -d
debug1: client_input_channel_open: ctype x11 rchan 3 win 65536 max 16384
debug1: client_request_x11: request from ::1 65447
debug1: channel 1: new [x11]
debug1: confirm x11
X Error of failed request:  BadDrawable (invalid Pixmap or Window parameter)
  Major opcode of failed request:  55 (X_CreateGC)
    Resource id in failed request:  0x5c
      Serial number of failed request:  1
	Current serial number in output stream:  3
	debug1: channel 1: FORCE input drain
	debug1: channel 1: free: x11, nchannels 2


The client  machine, 192.168.0.6 has the following version of X installed
X -version

X.Org X Server 1.4.0
Release Date: 5 September 2007
X Protocol Version 11, Revision 0
Build Operating System: FreeBSD 6.2-RELEASE i386 
Current Operating System: FreeBSD localhost 6.3-STABLE FreeBSD 6.3-STABLE #0: Sun Aug 24 09:27:22 EST 2008     alasdair at localhost:/usr/obj/usr/src/sys/MYKERNELIPFW i386
Build Date: 01 April 2008  04:41:15PM
 
	 Before reporting problems, check http://wiki.x.org
		 to make sure that you have the latest version.
		 Module Loader present

The server machine, 192.168.0.3  has this installed

$ X -version

XFree86 Version 4.5.0
Release Date: 16 March 2005
X Protocol Version 11, Revision 0
Build Operating System:NetBSD/i386 3.0.1 - The NetBSD Foundation, Inc.
Current Operating System: NetBSD paxpc1.localhost.net 3.0.1 NetBSD 3.0.1 (GENERIC) #0: Thu Jul 13 23:43:47 UTC 2006  builds at b3.netbsd.org:/home/builds/ab/netbsd-3-0-1-RELEASE/i386/200607131826Z-obj/home/builds/ab/netbsd-3-0-1-RELEASE/src/sys/arch/i386/compile/GENERIC i386
Build Date: 13 July 2006
        Before reporting problems, check http://www.XFree86.Org/
		to make sure that you have the latest version.
		Module Loader present
		Command line: X -version

Searching the error messages was not very helpful, it seemed like X could give out these messages for quite a number of reasons none of the available posts seemed to fit my problem.
My windows manager is xmonad-0.7_2 
Any clues?

Thanks in advance,

Alasdair

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