A network administrator is trying to add a new router into an established OSPF network．The networks attached to the new router do not appear in the routing tables of the other OSPF routers．Given the information in the partial configuration shown below,what configuration error is causing this problem?
Router(config)#router ospf 1
Router(config-router)#network 10．0．0．0 255．0．0．0 area 0