using freesql.org how do i set up wp-config.php

What do i need to put in the wp-config file where it says DB_HOST? When i got my SQL database from freesql.org i was told:

Database [my DB name] created
The permissions have been set on [my DB name]
You should now be able to connect to:

http://www.freesql.org
port 3306
as user [my username]

I have tryed filling in the DB_HOST Tag a http://www.freesql.org but is does not work!!!

plz plz help. Anybody!!!!