Management Central problem

Hi everybody, can any one of you shed some light into this problem?

Our AS/400 (iSeries...) is running V4R5 and latest Cum, and we are using

CA Express (V4R5 also) and latest Service Pack.
Everything is running OK.  We only have just this one AS/400.
NetServer and all other servers we need are up and running fine.

Today I started configuring "Management Central" under Op'sNav.
It's been a nightmare! There is no way to make it work, but even getting
the following joblog was a nightmare itself, since job QYPSSRV aborts
but does not volunteer to leave any joblog... Just by changing its
attributes before it started work (in JOBQ QSYS/QSYSNOMAX) I was able to
capture what follows.

I've cut part of the joblog, but in essence what it says is it gets an
"ERROR OCCURED DURING RETRIEVAL OF LOCAL IP ADDRESS"...
Further down there was a second message saying quite the same thing
about the Subnet mask...

How come an AS/400 which is working fine for everything else cannot get
its own IP address and Subnet mask? Does that make any sense?

Partial Joblog:

5769SS1 V4R5M0

Job name . . . . . . . . . . : QYPSSRV
User  . . . . . . :                QSYS

Job description  . . . . . . : QYPSJOBD     Library . . . . . :QSYS

Request                       01/11/01   20:33:23   QWTSCSBJ
*N       QCMD     Message . . . . :  -QSYS/CALL  PGM(QSYS/QYPSSRV)

CPFB5CE    Diagnostic              40    01/11/01   20:33:25   QYPSUTIL
QSYS        *STMT    QYPSUTIL      From module . . . . . . . . :
QYPSMSGCLS
>From procedure  . . . . . . :  joblogIt__10ypsMessageF20ypsExceptionSe
                                       2_10ypsMessage11ypsLogLevel
                                     Statement . . . . . . . . . :   487

                                     To module . . . . . . . . . :
QYPSMSGCLS
                                     To procedure  . . . . . . . :
joblogIt__10ypsMessageF20ypsExceptionSe
                                       2_10ypsMessage11ypsLogLevel
                                     Statement . . . . . . . . . :   487

                                     Message . . . . :   Function ended
due  to unexpected error.
                                     Cause . . . . . :   The function
ended due to an unexpected exception.
Message data is ERROR OCCURED DURING RETRIEVAL OF LOCAL IP ADDRESS.
...
------------------------
Antonio Fernandez-Vicenti
afvaiv@wanadoo.es