HELP!!! Problems with Xorg configuration

[897344]

Dear Sirs.
 I have installed FreeBSD 5.4 on my computer. But i couldn't configure X 
windows system. I have installed xorg, kde and gnome from my discs. But xorg 
is not working. 
 My video card: GeForce MX4000
Monitor: Samsung SyncMaster 793DF
 When i open xorg.conf file (# xorgcfg -textmode) I choose for monitor 
option: 30 - 70; Monitor that can do 1280x1024 @ 65 Hz
 But i was unsucsessful to join gnome or kde.
 What can i do????
 Waiting for your help.
 Best regards.