How to change INTERNAL password on NT

Hi all:

Could someone pls tell me how could I change the INTERNAL password form ORACLE to <somthing else>. I installed Oracle 8.1.6 on NT4 and try to execute the following command

SQL> alter user internal identified by oracle;

and come out with the following errors

alter user internal identified by oracle

           *
ERROR at line 1:
ORA-01918: user 'INTERNAL' does not exist Received on Fri Mar 23 2001 - 04:33:31 CST