had installed Oracle 9i Enterprise Edition Rel 2 on windows 2003 server .and created default database while installation .
after installation i am able to connect to database as system/admin@orcl as sysdba and normal , but when i changed the databse to archivelog mode , i am not able to connect the databse as normal user and when i am trying to connect as sysdba its connecting , i am getting the following error ORA-01017: invalid username/password; logon denied while i am trying to connect as normal user , but when i tried to connect as sysdba its connecting , plz help me ...