I'm really happy with my DSR-150, so I got a second one as a backup in case anything happened to it.  I did a backup of the configuration and then attempted to restore it to the "backup" router.  I was surprised that it failed saying the config file is invalid. Both routers are running 3.14WW firmware.  The only difference I can find is the first one is hardware revision C1 and the one I got as a backup is hardware version A4. Should I be able to restore this file to the other router?
Thanks.
-Rick