Virtual Server VM loses network connectivty after restart

Question

Hi , I have a problem with a VM in Virtual Server 2005 technology losing network. Here is the repro steps

1. Copy the VM from another server with saved state.
2. Create a VM using the same differencing disks and the saved state files but with a different network.
3. Restore the VM, it works fine and the network configuration is available.
4. Restart the VM, the network configuration list lost.

Is there any other configuration available to fix the network configuration, Please let me know.

Thanks, Siva