Can't login to MySQL remotely !

Hi there I am using red hat enterprise 5.6 as the main (local) DB server, currently I am trying to access MySQL using MySQL query browser from a windows machine. I keep getting an error as follows when I try to log in: MySQL Error number 1045 I know the username and password is correct as I use these locally, also I can ping the RHEL server. The port 3306 is also open and I have also issued the command: Code: GRANT USAGE ON *.* To 'root' at '<ipaddress>' IDENTIFIED BY '<root password>' But this doesn't seem to work and I am now running out of ideas help me please ! Thanks in advanced.

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