Picked up an older FC4700 from an online auction and have everything i need for hardware to coneect it. The unit appears to be booting and i can connect via ppp from a laptop. From there i am at a brick wall as far as management. I believe the unit is running Navi 5.2.0 but I dont have software of any kind to access the unit. Can anyone tell me where i can get this older revision of navisphere Manager?