Trying to use command line interface

[James Eaton]

I'm running MySQL 5.0.24 as a service on Windows XP Pro.  I'm trying to 
get into the command line environment and not having any luck.  Using:

...5.0\bin>mysql -u root -p rootpassword

I get another prompt for a password

Enter password: _

I enter the root password again, then I get the following error:

ERROR 1049 (42000): Unknown database 'rootpassword'

What am I doing wrong here?