ORA-01031: insufficient privileges

Hi,

I just finish installing ora10gR2 software on solaris 10 x86 testing machine & now try creating DB through dbca utility. During the creation of DB, I see the error msg "ORA-01503: CREATE CONTROLFILE failed, ORA-01158: database already mounted". So, I login the server & try to shutdown DB, but when I connect / as sysdba, I get this error msg "ORA-01031: insufficient privileges". I have done an extensive research on yahoo, asktom.oracle.com, otn.oracle.com, & google, and follow a numerous suggestions that people encountered this issue in the past; however, I haven't gotten any lucks so far. So, could someone please help me?

$ grep sysdba /etc/group

oracle::101:sysdba,oracle
$ grep sysdba /etc/passwd

sysdba:x:1001:101:Chris Oracle Testing Acct:/oraclesw:/bin/bash
$ id

uid=1001(sysdba) gid=101(oracle)
 $ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Tue Feb 20 15:16:41 2007

Copyright (c) 1982, 2005, Oracle. All rights reserved.

SQL> connect / as sysdba
ERROR: ORA-01031: insufficient privileges

SQL> conn sysdba/mypassword as sysdba
ERROR: ORA-01031: insufficient privileges

This was a response from Tom_at_oracle on someone's posted in the past "that means whomever installed your software used a group other then DBA to be the sysdba (internal) group. You'll need to find out what they used. DBA is the default, but you can override that during install." But I am the only one who installed oracle on this machine & already verified all of the sub-directories which are owned by sysdba:oracle. Any helps/suggestions are appreciated.

TIA,
-Chris Received on Tue Feb 20 2007 - 17:55:15 CST