start X app from cron

I seem to have gone brain dead, maybe normal... I cannot start an X app from cron. All my efforts have presented: cannot connect to X server ie: /opt/kde3/bin/kstart --desktop 4 /usr/bin/smtm. results in an email: kstart: cannot connect to X server not a problem with smtm, a perl/Tk app. ie: /usr/bin/smtm works -- Patrick Shanahan Registered Linux User #207535 http://wahoo.no-ip.org @ http://counter.li.org HOG # US1244711 Photo Album: http://wahoo.no-ip.org/gallery2