Realvnc cannot be connected

Realvnc cannot be connected-Linux general technology-Linux technology and application information. The following is a detailed description. Hello everyone, this is the configuration of my host, but I cannot log on to the client. Please help me to see what caused the problem. Thank you ~~~
[Root @ localhost ~] # Rpm-qa | grep vnc
Vnc-server-4.1.2-14.el5_3.1
[Root @ localhost ~] # Chkconfig -- list | grep vnc
Vncserver 0: Disable 1: Disable 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable

[Root @ localhost ~] # Vi/root/. vnc/xstartup
#! /Bin/sh

# Uncomment the following two lines for normal desktop:

Unset SESSION_MANAGER
Exec/etc/X11/xinit/xinitrc

[-X/etc/vnc/xstartup] & exec/etc/vnc/xstartup
[-R $ HOME/. Xresources] & xrdb $ HOME/. Xresources
Xsetroot-solid gray
Vncconfig-iconic &
Xterm-geometry 80x24 + 10 + 10-ls-title "$ VNCDESKTOP Desktop "&
Twm &
[Root @ localhost ~] # Vi/etc/sysconfig/vncservers
VNCSERVERS = "1: root 2: zhang"
VNCSERVERARGS [1] = "-geometry 800x600-nolisten tcp-nohttpd"
VNCSERVERARGS [2] = "-geometry 800x600-nolisten tcp-nohttpd-localhost"
[Root @ localhost ~] #/Etc/init. d/vncserver start
Start the VNC Server: 1: root
New 'localhost. localdomain: 1 (root) 'desktop is localhost. localdomain: 1

Starting applications specified in/root/. vnc/xstartup
Log file is/root/. vnc/localhost. localdomain: 1.log

2: zhang [failed]