Hola lormartinez, bienvenida.
It sounds like MySQL server isn't running.
If you are using Windows, make sure mysqld-nt.exe is running. You can use
Task Manager to see if the service is running and Control Panel's
Administrative Tools|Services dialog to start the service if it is not. On
my computer the service name is MySQL.
Más información:
http://forums.netbeans.org/post-14735.html,
Si utilizas algun LAMP o mysql independiente verifica que los servicios estén arriba e intentalo de nuevo.
Saludos...
