V5R1 Mgmt Central not starting.

We are on V5R1 and have recent cumes.
I have V5R0 Client Access. Whether I start MGTC from OPS NAV or
a command line I get the message below.
I checked the archives and the IBM APARS. I have found no relevant info.
I know nothing about Java.  Has anyone a suggestion as to what I should do
next, perhaps submit an APAR.
TIA
Frank Kolmann
                                     Message . . . . :  -QSYS/CALL
PGM(QSYSDIR/QYPSJSVR)
CPFB9BC    Diagnostic              40    21/01/03   18:03:59   QYJSPART
QSYS        *STMT    QYJSPART     QSY
                                     From module . . . . . . . . :
QYJSPPGM
                                     From procedure  . . . . . . :
callProgram
                                     Statement . . . . . . . . . :   93
                                     To module . . . . . . . . . :
QYJSPPGM
                                     To procedure  . . . . . . . :
callProgram
                                     Statement . . . . . . . . . :   93
                                     Message . . . . :   Initialization
failed.
                                     Cause . . . . . :   Static
initialization of class
                                       com.ibm.mc.client.McEnvironment
failed. Recovery  . . . :   If the problem
                                       persists, contact service.