no, you don't want the www part. you need to give it the path as the server will see it. assuming you've uploaded the sql file to your home directory, the one you're first put into when you FTP or ssh in, you wouldn't need a directory at all, just the file name.
Also, don't forget to specify both the host name and database name as shown above, that's probably your main issue.
Also, Simon was right, I shouldn't have said "... command to dump" but the command to load the database. A dump backups up data, not restores it. sorry for the confusion.