hey guys new to vaping, started out with the one from 711 last week, and just bought the riva 901. my problem is that the atomizer doesnt work or i just dont know what im doing. i bought a kit and also some cartomizers and they work fine but when i try to use the attys i get nothing. no smoke no anything. i also tried to drip 2-3 drops directly onto the atty and also nothing. can someone help me out here.