server0 not started due to UME logon group problem

I am doing a system copy ABAP+Java and in the post-intallation task. The server0 can not be started due to the following error:

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Caused by: com.sap.security.core.persistence.datasource.PersistenceException: Connect to message server host failed

Connect_PM TYPE=B MSHOST=sapbwtsap1 GROUP=PUBLIC R3NAME=BWT MSSERV=sapmsBWT PCS=1

ERROR Group PUBLIC not found

TIME Sat Aug 27 21:15:50 201

RELEASE 700

COMPONENT LG

VERSION 5

RC -6

MODULE lgxx.c

LINE 4300

DETA

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The group is setup properly in SMLG in ABAP and is green. I have also tried different group name but got the same error.

Does anyone come aross this issue?

Thanks,

Jun