Problems with exporting display for oracle apps installation

Question

Platform : RedHat Enterprise Server 4
I'm trying to do a 2 tier installation of Oracle Applications.
As part of the install, I need to generate a display that can be used by the applmgr user, but bellongs to another user.
When running the following command line, I get an error message.
xauth -f .Xauthority extract - $DISPLAY | rsh -l applmgr localhost /usr/X11R6/bin/xauth merge -
connect to address 127.0.0.1: Connection refused
Trying krb4 rsh...
connect to address 127.0.0.1: Connection refused
trying normal rsh (/usr/bin/rsh)
localhost: Connection refused
Does anyne have an idea? I've done some troubleshooting, but I can't figure out what is wrong.
I have added the following in the xmgr and applmgr's profiles
DISPLAY=localhost:13
export DISPLAY
The vnc server runs on display 13

Answer 1

These are the scripts/files I'm using for installing Oracle Apps 11.5.10 on CentOS 4.2 (RedHat Clone) - hope it helps:
install.sh - adds necessary packages
yum install libaio
yum install openmotif
yum install gcc
yum install gcc-c++
mv /usr/bin/gcc /usr/bin/gcc344
mv /usr/bin/g++ /usr/bin/g++344
rpm -iUhv compat-gcc-7.3-2.96.126.i386.rpm
rpm -iUhv --nodeps compat-gcc-c++-7.3-2.96.126.i386.rpm
ln -sf /usr/bin/gcc296 /usr/bin/gcc
ln -sf /usr/bin/g++296 /usr/bin/g++
setup.env - Setup paths
# Oracle Setup Environment
ORACLE_SETUP_APPS=/setup/oracle/install/ebusiness/startCD
ORACLE_SETUP_PATCH=/data/setup/install/db
oracle.env - Installation environment
# Oracle Environment
ORACLE_BASE=/d01/oracle
ORACLE_HOME=$ORACLE_BASE/visdb/9.2.0
ORACLE_VAR=/var/opt/oracle
ORACLE_SID=VIS
ORACLE_TERM=xterm
# export TNS_ADMIN= Set if sqlnet.ora, tnsnames.ora, etc. are not in $ORACLE_HOME/network/admin
NLS_LANG=AMERICA_AMERICAN.UTF8
#ORA_NLS33=$ORACLE_HOME/ocommon/nls/admin/data
export ORACLE_BASE ORACLE_HOME ORACLE_SID ORACLE_TERM NLS_LANG ORA_NLS33
LD_ASSUME_KERNEL=2.4.19
LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
export LD_ASSUME_KERNEL LD_LIBRARY_PATH
# Set shell search paths
export PATH=$PATH:/usr/sbin:/sbin:$ORACLE_HOME/bin
oracle - Kernel Parameters
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
kernel.sem    = 250 32000 100 128
fs.file-max   = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 262144
net.core.rmem_max     = 262144
net.core.wmem_default = 262144
net.core.wmem_max     = 262144
setup_oracle_1.sh - Installation Step 1 : Add oracle user
#!/bin/sh
PATH=$PATH:/usr/sbin
groupadd dba          # group of users to be granted with SYSDBA system privilege
groupadd oinstall     # group owner of Oracle files
useradd -m -c "Oracle software owner" -g oinstall -G dba oracle -s /bin/bash
passwd oracle
setup_oracle_2.sh - Installation Step 2 : Prepare installation directory
#!/bin/sh
. ./oracle.env
BASE_DIR=/`echo $ORACLE_BASE | cut -d'/' -f2`
mkdir -p $ORACLE_BASE
chown -R oracle:oinstall /$BASE_DIR
chmod -R 775 $BASE_DIR
mkdir -p $ORACLE_VAR
chown oracle:dba $ORACLE_VAR
chmod 755 $ORACLE_VAR
setup_oracle_3_apps.sh - Installation Step 3 : Start installer
#!/bin/sh
. ./oracle.env
. ./setup.env
sysctl -p ./oracle
su oracle -c "export DISPLAY=:0.0 && $ORACLE_SETUP_APPS/Disk1/rapidwiz/rapidwiz"There are some steps afterwards, but with this I'll usually end up with a complete installation.
C.