I have installed Oracle 10G in RHEL 5 -in my personal box.
I have
1. password file in /dbs location // recreated orapw file.
2. Remote_login_password=Exclusive
3. Able to login via sqlplus i.e., connect /as sysdba
4. listener are running.
5. started emctl console.

but still cann't able to connect as sys as sysdba in Enterprise manager.