Upgrade Problem

[netsec]

i have upgrade problem i use normal root passwd but output "Rebuild failed." details is under .

Code:

Stopping ispCP GUI-Backend communication Daemon: ispcp_daemon.
        Stopping ispCP Network Traffic Logger: ispcp_network
ispcp_network is already stopped (warning).
.
        Upgrading system values...done


        Setting GUI Permissions: .................(more points and wait)....................done
        Setting Engine Permissions: .............done
        Rebuilding customers...Enter password:
failed!
        Rebuild failed.
dcserver:/var/www/ispcp/engine/setup#