You should try and make sure that the extruder is extruding plastic out of it, raise it to the top and extrude some plastic. If that works then you should try and fix the bed calibration, since this printer is not autocalibrating, you need to set the bed level yourself. Start a print up, and when it starts to print and is at the right height turn it off. Then move the bed to each corner and use a sheet of paper and tigthen/loosen the screws with the supplied hex wrench until the bed paper is moving freely then move until you feel that the nozzle is catching a little, then loosen back the screw at 1/4 turn, that should get the nozzle height set perfectly, try and see if that works. If not plastic is still coming out, or you hear the extruder motor skipping steps, then you should lower the bed a little bit, the nozzle is still too close. Hope that helps :D