Oracle - Falla al instalar

He instalado Oracle 7.3.3. en windows NT server 4.0 y lo he hecho en una
partición NTFS, comenzando por Oracle7 workgroup Server Products, después
instalando Oracle7 Clients Products(opcion leave ...) y finalmente
Application User y cuando he ido al entreprise manager he ingresado
con el usuario "internal" y la contraseña "ORACLE" , luego de comenzar
con la actualizacion del repositorio se cayo y luego la vez que he querido
volver a ingresar me entrega el siguiente mensaje :

Failed to get local hostname

y otro que dice

VOC-00002 Internal error Failure to obtain interface (Logon)

Que puede estar mal

Muy agradecido por vuestra ayuda

Chekea este documento
-------------------------------------
Doc ID: Note:52251.1
Subject: OERR: VOC 2 Internal Error: Failure to obtain interface (name).
Type: REFERENCE
Status: PUBLISHED
Content Type: TEXT/PLAIN
Creation Date: 06-FEB-1998
Last Revision Date: 07-APR-2000

Error : VOC 2
Text : Internal Error: Failure to obtain interface (name).
---------------------------------------------------------------------------
Cause : A call to GetIDsOfNames for the interface failed. There may be a mismatch between the calling process and the external server. This error can occur for one of the following reasons:

* TCP/IP is not installed.
* The SQL*Net tcp adapter is not installed. It is installed by default when Enterprise Manager is installed.
* The Deamon listening port is already in use (default is 7770).
* If the default was modified and a "Listening Address" for the Deamon had been setup, the address may be an invalid TNS address.
* The "oracle_home\bin" may not be in the PATH.

continua...

Action: To correct the error perform the following steps:

* Make sure the PATH variable contains "ORANT\bin".
* Check that the port 7770 is not already in use.
* Make sure that the SQL*Net TCP adapter is installed.
* Check the 'Listening Address' Parameter in the NT registry. It may be set to an invalid address. Then, try the following:

* Run Oracle Deamon Manager and go to the Configuration Parameters and check the value of 'Listening Address'. It should be 'not found'. If it has a value, then remove it.

* If the listeneing address is already set correctly (to 'not found'), then change the TCP port to a different free port number and restart the OEM.

* If this does not help, enable deamon tracing and check the traces.

Search for 'nslisten'.

sqlnet.ora:
deamon.trace_level=16;
deamon.trace_directory=<any_existing_dir)