Hi I'm new to Oracle and computers and I need help.
I installed Oracle 8.1.7 and OEM2.2 on Win2K. I could connect to the database as sysdba but now I can't anymore (either through DBAStudio or using SVRMGR). I keep getting ORA-01031: insufficient privileges

I can connect using sys/change_on_install or system/manager or my own OS username/password, but not as sysdba.

I know that in order to start up an Oracle database using the connect internal or connect / as sysdba syntax, the currently logged in OS user must be in the ORA_DBA Windows group, if the operating system is Windows NT or 2000. And I double-checked it already, in fact it was working fine before. Any idea about what might be happening?

Thank you in advance.