Batch file

I have the following batch file on Windows XP HE
@echo off
set pfdsk=g
set pfdata=g:
set pfprog=g:
set pfdir=
set pfmenu=g:\fp\menus
set pfglob=
set pfconfig=
set path=g:\fp;g:\;g:\fp\menus;g:\fp\lib;g:\filepro
p yearmenu

When I set thedislay options to full screen the colors are distorted. When run it in a window it run fine. What can I do to run it in full screen