Cisco Wireless :: Aironet-LAP1142N - How To Update Firmware

I would like to update the firmware of this AP but I'm having problems. The commands seems to be not complete
 
APa493.4c46.8e83#?
Exec commands:
  cd               Change current directory
  clear            Reset functions
  clock            Manage the system clock
  crypto           Encryption related commands.
  debug            Debugging functions (see also 'undebug')
  delete           Delete a file
  dir              List files on a filesystem
  disable          Turn off privileged commands
  enable           Turn on privileged commands
  exit             Exit from the EXEC (code)