That's what happens when you pirate software isn't it. I'm gonna be nice and help you out, although I reckon that's the price you pay when you decide not to pay for the product.

You need to select your sound card. Go into Device --> Device Setup --> VST Multitrack and select your ASIO driver. This is your sound card. It will be something like DMX 6fire ASIO (I'm taking a guess there but it should be the obvious choice).

Now you have your sound card setup, you need to select an input and an output for the midi track.

Create a midi channel. Set the input of that channel to be tghe Radium Controller. Make sure you have this particular channel selected. Now when you press keys on the radium controller, Cubase should register some midi in (the green bar will go up when you hit a key).
Next, select the output for the midi channel. Go to Devices --> VST Instruments --> click on "no vst instrument and a drop menu will come up, select a synthesizer to want to play the sound with.
Go the the midi out select for the midi channel and select the instrument you have just created (or one of the dodgy MS wavetable synths if you want).

Now when you press a key, it should play.

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1 out of every 4 people in this country are mentally disturbed. Look at your 3 closest friends. If they seem okay, then you're the one.