Can't Shutdown Mysqld

I installed mysql-4.1.7 on solaris 8. I can start it using
mysqld_safe. But when I tried to shutdown using 'mysqladmin -p
shutdown' and type in the root password, it gave:

mysqladmin -p shutdown
Enter password:
mysqladmin: connect to server at 'localhost' failed
error: 'Access denied for user 'oracle'@'localhost' (using password:
YES)'

I started mysqld_safe under Unix account "mysql", why it complains
about 'oracle'?