I literally just opened my new Evic VT60 , with a kangertech subtank plus & subtank (regular) no matter what i do, the minute i hit the fire button, it switches from temp control to wattage.. Is their something im missing? I've tried my .5ohm and 1.2ohm coils, no difference. It starts in temp control for the first 1 to 2 seconds than immediately switches to wattage it will not run in temp control... any ideas?