Oh I see, you want to move it to a new server? If that's what you're trying to do then the answer might be slightly different depending on your operating system. You should install the same version of Zimbra on the new server as you've got on the old one. When you've done that and made sure it's working you copy the /opt/zimbra directory (using rsync) to the new machine, run the zmfixperms script and then run the installer again (use the same version again) and it will perform an 'upgrade' install. After that is working you should be able to upgrade the version to 4.0.1 and then to a more recent release.
One point, after running the zmfixperms you may need to reset the LDAP & MySQL passwords and you'll find details in the
wiki.
This is assuming that your new server will have the same hotsname as the old server and that the IP address and the DNS A & MX records also point to that server.