Using the Net8 Assistant. When I click/double click service naming then Edit - Create. Nothing happens, which is why I tried the Net8 Configuration Assistant that failed then thought right I should try doing it from the command line, getting myself into a state of desperation resulting in me using the wrong tool. Does it sound like the Net8 Assistant isn't installed properly?

Anyway here is my TSNames.ora
Code:
# TNSNAMES.ORA Network Configuration File: I:\ORANT\ora81\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

# --------------------------------------------------------------------

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

# -- FastContinuity Live -- #
FastCont_Live.Nat.BT.com = 
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 147.149.112.67)(PORT = 1521))
    )
    (CONNECT_DATA = (SID = fcont)(SERVER = DEDICATED))
  )

# -- FastContinuity BackUp -- #
FastCont_BackUp.Nat.BT.com = 
  )
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 147.147.240.167)(PORT = 1521))
    )
    (CONNECT_DATA = (SID = fcont)(SERVER = DEDICATED))
  )

# -- FastContinuity Historic connection -- #
FCONT.IUSER.IROOT.ADIDOM.COM =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = sryndent98)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = fcont)
    )
  )

SQLNet.ora (Could the default domain name be where my problem is?)
Code:
# SQLNET.ORA Network Configuration File: I:\ORANT\ora81\NETWORK\ADMIN\sqlnet.ora
# Generated by Oracle configuration tools.

NAMES.DEFAULT_DOMAIN = iuser.iroot.adidom.com

SQLNET.AUTHENTICATION_SERVICES= (None)

#NAMES.DEFAULT_DOMAIN= .nat.bt.com
#NAMES.DIRECTORY_PATH= (TNSNAMES, ONAMES, HOSTNAME)
# SQLNET.AUTHENTICATION_SERVICES= (NTS)

SQLNET.CRYPTO_SEED = 4fhfguweotcadsfdsafjkdsfqp5f201p45mxskdlfdasf