New to DBA !

[Rama, Shreekantha (K.)]

Hi All,       I am new to the world of Oracle..     I am having this issue..           I have created a database on Oracle 8.1.7.4..           But I am not able to access as the password is lost..         Now, I am not able to login..         I tried login using system /manager.. but oracle is not allowing me to login ..           What's the solution ?? Regards     Shreekanth