gwt and google cloud sql

Hi every one

I am trying to create new project on gwt 2.7 and jdo 2 and connect it to google cloud sql.

I created server instance, created data base and one table on google cloud sql 

I connected to my table in my database with  MySQLWorkbench software and run queries like select and insert and everything is work.

now i trying to connect to database development plugin in eclipse but is not working i get exception like this 

ava.lang.ClassNotFoundException: com.mysql.jdbc.Driver

at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:814)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.createConnection(JDBCConnection.java:327)

at org.eclipse.datatools.connectivity.DriverConnectionBase.internalCreateConnection(DriverConnectionBase.java:105)

at org.eclipse.datatools.connectivity.DriverConnectionBase.open(DriverConnectionBase.java:54)

at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.open(JDBCConnection.java:96)

at com.google.appengine.eclipse.datatools.connection.GoogleSqlConnectionFactory.createConnection(GoogleSqlConnectionFactory.java:36)

at org.eclipse.datatools.connectivity.internal.ConnectionFactoryProvider.createConnection(ConnectionFactoryProvider.java:83)

at org.eclipse.datatools.connectivity.internal.ConnectionProfile.createConnection(ConnectionProfile.java:359)

at org.eclipse.datatools.connectivity.ui.PingJob.createTestConnection(PingJob.java:76)

at org.eclipse.datatools.connectivity.ui.PingJob.run(PingJob.java:59)

at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

I added mysql jar to lib folder like in this guide 

https://developers.google.com/eclipse/docs/cloudsql-createapp#creating

what am i doing wrong, does anyone sample project that he can share with me?

thank you very match Gal

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