downgrading problem

i just downgraded a Hpnd mipsbe from version 6 to the last version 4 and lost it is there a way to recover this because it is 120 feet in the air thanks

Are you sure that 4.x works with it ?

I’m sorry to say, but most likely your board doesn’t support routeros 4.x, and the only option would be to reinstall the board with Netinstall.

Never install older version than you got the device with.