I can't here the recording I made with a midi/USB controller.

I'm have problems with logic pro 9.1.8 sometimes with the midi/usb controller. I just recorded a track with the midi/usb controller which i just heard myself record it but now that I'm done with the recording I cant here any of the USB/midi controller tracks that I just made. So now I cant here all the tracks playing at once. I can only hear the files that I dragged in from itunes. What am I doing wrong?