Java.io.IOException: /opt/sun/portal/bin/psconfig: not found

Question

I have installed JES 2005Q4 and then I try to setup Portal Server 7 and at the beginnig of the installation it gave thsi error: Is there any thing you can suggest?
1. Install
2. Start Over
3. Exit Installation
What would you like to do [1] {"<" goes back, "!" exits}?
Java Enterprise System
|-1%--------------25%---
java.io.IOException: java.io.IOException: /opt/sun/portal/bin/psconfig: not found
at java.lang.UNIXProcess.<init>(UNIXProcess.java:148)
at java.lang.ProcessImpl.start(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
at java.lang.Runtime.exec(Runtime.java:591)
at java.lang.Runtime.exec(Runtime.java:464)
at com.sun.orion.installer.common.config.OrionConfigurator.executeCmdWithArgs(Unknown Source)
at com.sun.orion.installer.portalserv.config.PortalServerConfigurator.unconfigure(Unknown Source)
at com.sun.orion.installer.common.config.OrionConfigurator.performUnconfiguration(Unknown Source)
at com.sun.orion.installer.common.config.ConfigLeaf.uninstall(Unknown Source)
at com.sun.install.products.InstallComponent.performUninstallation(InstallComponent.java:1637)
at com.sun.install.products.InstallNode.finishUninstall(InstallNode.java:1270)
at com.sun.install.products.InstallComponent.performUninstallation(InstallComponent.java:1642)
at com.sun.install.products.InstallNode.finishUninstall(InstallNode.java:1270)
at com.sun.install.products.InstallComponent.performUninstallation(InstallComponent.java:1642)
at com.sun.install.products.Product.performUninstallation(Product.java:223)
at com.sun.install.products.InstallNode.CheckCancelledAndWriteToLog(InstallNode.java:965)
at com.sun.install.products.InstallNode.startInstall(InstallNode.java:1090)
at com.sun.install.products.InstallComponent.performInstallation(InstallComponent.java:1457)
at com.sun.install.products.Product.performInstallation(Product.java:651)
at com.sun.install.tasks.ProductTask.perform(ProductTask.java:153)
at com.sun.wizards.core.Sequence.perform(Sequence.java:343)
at com.sun.wizards.core.SequenceManager.run(SequenceManager.java:226)
at java.lang.Thread.run(Thread.java:595)
Error in executing command : /opt/sun/portal/bin/psconfig --unconfig /tmp/psunconfig_bla.bla_114286064037648246.xml
--------------50%-----------------75%--------------100%|
Installation Failed
No software was installed.

Answer 1

at the installation log file containing these:
Installation Log
Installing Java Enterprise System
Log file: /var/opt/sun/install/logs/Java_Enterprise_System_install.
B03201513
Installed: /var/sadm/prod/sun-ps7_0-
entsys/uninstall_Sun_Java_tm__Enterprise_System_2005Q4.class
Uninstaller is at: /var/sadm/prod/sun-ps7_0-
entsys/uninstall_Sun_Java_tm__Enterprise_System_2005Q4.class
OrionUninstallersun-ps7_0-entsys
Installing RPM: sun-ps7_0-entsys
RPM sun-ps7_0-entsys successfully installed.
Installing RPM: sun-ps7_0-entsys-l10n
error: ../Product/entsys/Packages/sun-ps7_0-entsys-l10n-4.0-1.i386.rpm: MD5
digest: BAD Expected(50518d27bb86729827e12611f261333a) !=
(9bff1755f96e04bebe270aa64f9d9d4c)
error: ../Product/entsys/Packages/sun-ps7_0-entsys-l10n-4.0-1.i386.rpm cannot
be installed
Error: RPM sun-ps7_0-entsys-l10n install failed}.
Install complete. Package: sun-ps7_0-entsys-l10n
rpm: Skipping rpm remove of sun-ps7_0-entsys-l10n, not installed.
rpm: Skipping rpm remove of sun-portal-search, not installed.
rpm: Skipping rpm remove of sun-portal-portlets, not installed.
rpm: Skipping rpm remove of sun-portal-base, not installed.
rpm: Skipping rpm remove of sun-portal-admin, not installed.
Installing RPM: sun-mobileaccess-config
package sun-mobileaccess-config-1.0-25 is already installed
Error: RPM sun-mobileaccess-config install failed}.
Install complete. Package: sun-mobileaccess-config