I am having a problem configuring any interface on my ASA 5510 running ASA 8.2.1. When i try to configure an interface I am unabl eto assign an IP addres, security level, name the interface or do anythingt else that would allow me to use the device. When I hit the "?" to see the allowed command I recieve the following:

corpfir01(config)# interface ethernet 0/1

corpfir01(config-if)# ?

Interface configuration commands:
  default      Set a command to its defaults
  description  Interface specific description
  dhcp         Configure parameters for DHCP client
  duplex       Configure duplex operation
  exit         Exit from interface configuration mode
  help         Interactive help for interface subcommands
  no           Negate a command or set its defaults
  shutdown     Shutdown the selected interface
  speed        Configure speed operation
corpfir01(config-if)#

Any help is greatly appreciated