Monitor's and Graph_Set

Hi there I've been trying to open and run a monitor in grass using d.mon

I get the error message as below when I try to do this

x0
Graph_Set: can't open
Please start graphics monitor <x0>.
Error - Graphics monitor <x0> not running!
Problem selecting x0. Will try once more
Please start graphics monitor <x0>.
Error - Graphics monitor <x0> not running!

My setenv looks as below

setenv
TERM=xterm
HOME=/home/northwind/dunnj
SHELL=/usr/local/bin/tcsh
USER=dunnj
LOGNAME=dunnj
PATH=/home/northwind/dunnj/bin/scripts:/home/northwind/dunnj/bin/alpha:/usr/local/bin:/usr/sbin:/sbin:/usr/bin:/usr/local/bin/X11:/usr/bin/X11:/usr/local/etc:/etc:/usr/etc:.:/usr/local/lib/idl/bin/
SHLVL=1
PWD=/proj/ice/MODELS/Grass.alpha
HOST=polarbear.colorado.edu
HOSTTYPE=unknown
MACHINE=alpha
IDL_DIR=/usr/local/lib/idl
IDL_PATH=+/usr/local/lib/idl/lib
GIS=/proj/ice/MODELS/Grass.alpha/src
MAIL=/usr/spool/mail/dunnj
PRINTER=ccarqms
MANPATH=/usr/local/man:/usr/man

Now this is the setenv file for the machine on which grass is installed,
so what do I need to set my DISPLAY to ?

It's a DEC Alpha , called polarbear .

I'm running it remotely from another machine (DECSTATION)

Secondly what does Graph_Set do and is it related to grass, if so where is it ?

Any help would be greatly appreciated.

Jeremy