about the windows superpack work with Xming server

[John 2004]

Hi everyone
   I have install grads1.9-rc1 superpack, and when I use command line to
start, it will autostart the Xming server, it used to work excellently.
And then I also install cygwin in my windows xp (which I can use another
softwate NCL). Now the NCL work well, but when I start grads using command
line, the Xming does not start, I think it conflicts with the environment
variable which set in cygwin or NCL(use the common /usr dir), so how can I
configure the Xming or grads so that I can use the grads and ncl, both.
   Ps: If I start the Xming.exe and set the GADDIR to the environment
variable, the grads will also work.
John Lu