Just remember that in some settings it won't work.
Make sure that the trigger is set so that the led trigger light is off. This seems to be the most important thing to get you going.
And make sure that the attack is set less than the decay.
Turn the sensitivity, colour and intensity all the way up.
Turn the blend right up so you are getting the full wet signal
The band pass filter is best set to band pass (the middle setting), in low pass it seems to be a bit erratic with guitar
and set the range switch to full
switches are
Sweep (up /down) Bandwidth (hi/low)
Range (off / full / half) mode (highpass / bandpass / lowpass)
If you get super stuck and can be bothered to translate the page this is useful
http://www.pisotones.com/Meatball/psst/meatball-psst.html