Hi there !
I need your help, I just installed Cubase LE5 on my computer and there’s a problem. When I import MIDI files there’s just no sound, nothing at all… is there something I must do to make it sound ??? I just know nothing about this program 
You need to assign the MIDI data ro a device that makes the sound. In Cubase the most convenient way would proably be virtual instruments - try google on what MIDI is and how it works…
Well, you´ll have to learn a lot about it, otherwise you won´t get far…