upgrade 9i to 10g --> issues with connecting as sysdba

Hi,

• I just installed oracle10g on solaris enviroment where there was oracle 9i running.
• OS user oracle is the owner of oracle 9i
• I created new user oracle10 and installed oracle 10g with the new user as part of groups : oinstall, dba, oper
• After setting up my enviroment variables accordingly, now I want to connect as sysdba with this oracle10 user:

$ sqlplus /nolog

SQL*Plus: Release 10.2.0.1.0 - Production on Tue Aug 1 12:31:46 2006

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

SQL> conn sys as sysdba
Enter password:
ERROR:
ORA-01031: insufficient privileges

SQL> Any idea where I need to touch for getting this privileges? Received on Tue Aug 01 2006 - 11:33:48 CDT