Portal Server 7 installation problem?

Question

Firstly I have installed JES 2005Q4, after that I want to upgrade portal server 6 to the portal server 7. and when I try it, it gave these errors. What I have to do?
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_devserver.efes-yazilim.com_114287575411016186.xml ------------50%-----------------75%--------------100%|
Installation Failed
No software was installed.
You can view the installation summary and log by using the choices below.
Summary and log files are available in /var/sadm/install/logs/.
You can refer to the Troubleshooting chapter of the Java Enterprise System
Installation Guide to resolve the installation issues.
Enter 1 to view installation summary and Enter 2 to view installation logs
[1] {"!" exits} 2
Installation Log
Installing Java Enterprise System
Log file: /var/opt/sun/install/logs/Java_Enterprise_System_install.
B03201923
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
RPM sun-ps7_0-entsys-l10n successfully installed.
Mobile Access Component
Skipping component sun-mobileaccess because it is already installed.
Skipping component sun-mobileaccess-config because it is already installed.
Portal Server Administrator
Installing RPM: sun-portal-admin
file /opt/sun/portal/lib/config.jar from install of sun-portal-admin-7.0-1
conflicts with file from package sun-portal-configurator-6.3-25.12.2
file /opt/sun/portal/lib/PSversion.properties from install of sun-portal-admin-
7.0-1 conflicts with file from package sun-portal-core-6.3-25.12.2
file /opt/sun/portal/lib/jdom.jar from install of sun-portal-admin-7.0-1
conflicts with file from package sun-portal-portlet-6.3-25.12.2
Error: RPM sun-portal-admin install failed}.
Install complete. Package: sun-portal-admin
<--[64%]--[ENTER To Continue]--[n To Finish]--> {"!" exits}
rpm: Skipping rpm remove of sun-portal-admin, 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
RPM sun-mobileaccess-config successfully installed.
Installing RPM: sun-mobileaccess
RPM sun-mobileaccess successfully installed.
rpm: Skipping rpm remove of sun-mobileaccess-config, not installed.
rpm: Skipping rpm remove of sun-mobileaccess, not installed.
Enter 1 to view installation summary and Enter 2 to view installation logs
[1] {"!" exits}

Answer 1

After a successful install the Directory, AM servers are down. You will have to start them after the install.
Stop start the process below in the order:
Stop/Start Directory Server instance:
Stop/Start Webcontainer instance running AM Server and Portal Server
Restart Cacao /opt/SUNWcacao/bin/cacaoadm restart
If the above does not fix it, take a look at the /var/opt/SUNWportal/portals/portal1/logs/<portal-instance>/*.logs
and the webcontainer logs for more details