This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
Is phpMyAdmin running on a web server on the same machine as the MySQL server? By default, MySQL is setup to not allow connections from outside the machine itself. One column in the user table is the machine the user can come from. Check out step 5 of this page on how to grant access to update this.