Help, Midi- USB problem

[pounish]

Hi, Ive got a microkorg with a mabook and i bought the midisport uno to conect my microkorg to my laptop. i like garageband, but i got a problem i dont know how to connect my microkorg to the garage band, i already installed the drivers for the midi-usb and i plugged the midi out to the keyboard midi out and the usb to the laptop but it isnt showing, i think it dosnt recognize it or something like that.
please anyone help me