[CentOS] VNC server problem

HI all,

		i am configuring VNC server in CentOS 5.1. i have enables this two
lines in /etc/sysconfig/vncserver file

VNCSERVERS="2:vnc"
VNCSERVERARGS[2]="-geometry 1024x768 -depth 24"

here i have created a user vnc and set the password using vncpasswd cmd.


then i started the vncserver 

# vncserver
        
        New 'localhost.localdomain:1 (gopinath)' desktop is
        localhost.localdomain:1
        
        Starting applications specified in /root/.vnc/xstartup
        Log file is /root/.vnc/localhost.localdomain:1.log
        
The above message was displayed about executing vncserver command. no OK
status was displayed.


then i used cmd 

 vncviewer localhost.localdomain:5901

it prompted for the passwd i gave the password then 

it started vncviewer but in that only cursor is displayed which can be
moved. but no GUI display. 

Please help me on this if any one knows i am still a beginner to linux