Problem with connect my Database

Hello,

I want to be able to connect from PHPStorm for Mac with DB Navigator.
I have install the plugins and make necessary adjustments.
However, when I click on a table to display the data, it displays me:

[2013-04-26 16:03:25] Exception in thread "main" java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:171)
    at com.intellij.persistence.database.console.RemoteJdbcServer.main(RemoteJdbcServer.java:15)

I have tested my setup and here is what displays when I click the test button:

Test connection to "XXX" succeeded. Configuration is valid

So I ask to you to see if you have an idea of this problem?

Thank you in advance for your help.