Issue in windchill cloning/rehosting

I am cloning our production server from windows 2003 32bit machine to windows 2008 64 bit machine.

After copying all the folders from source windchill installation to target installatioon, I have installed JAVA throguth PSI and set JAVA_HOME in Windows environment.

But after launching the windchill shell to do further commands I am getting below errors:

D:\PTC\Windchill_9.1\Windchill\bin>windchill version

Exception in thread "main" java.lang.NoClassDefFoundError: wt/util/version/WindchillVersion

Caused by: java.lang.ClassNotFoundException: wt.util.version.WindchillVersion

at java.net.URLClassLoader$1.run(URLClassLoader.java:202)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(URLClassLoader.java:190)

at java.lang.ClassLoader.loadClass(ClassLoader.java:307)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)

at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

Could not find the main class: wt.util.version.WindchillVersion. Program will exit.

Can somebody please help me in this.