VSTs & CUBASE SX

I am totally new to Cubase SX on the PC, and I am having a nightmare of a time trying to use any of my VST intruments like Stylus, or Trilogy or V-Station, or basically ANYTHING for that matter! I can't get any of them going for me on the sequencer. :(

*I select the Instrument with F11....

*I have the output on a MIDI channel selected to the particular modude (like Stylus if I'm tryin to use Stylus for example)

Can someone PLEASE PLEASE give some step by step instructions on actually bringing forth a VST sound onto the Cubase SX sequncer so I can play it and chop up the sounds?

Anybody?

Please? :?

-jOHNNY