Basic Midi Question, .. Options

[hipster]

Hi, i just got myself a midi keyboard, an m-audio radium 49, i was using cubase sx as a recording program without midi beforehand and now i want to add some midi tracks to some songs i have been doing

I have been mucking around trying to get it work, this is my setup

the m-audio midi keyboard
ibook 800 G3
Cubase SX

Basically all i want it to do is get what i play on the midi keyboard to come out on my speakers using cubase, I mucked about with softsynth just to check it was all working, but I want to actually be able to just use cubase to hear what i am doing, and then playback compositions

It is sending me crazy, I really cant afford any more bits and bobs!

Cubase does recognise what i am playing, the midi scores come up, but i cant get the monitoring or playback to work

thanks

martin