Dear Friend,

    Are you using VMa 5.0 and Esxi 4.1? </p>

    Are you trying to add your esxi server via the vifp addserver command?

    Are you getting "Insufficient Permissions for root@yourserverhere?"

    Are you banging your head against the wall?

    Did you enable lockdown mode on the ESXi console?
    </ul>

    Go disable it and your problem will be solved....