Well.. start turning up the watts some more. What ohm coil setup do you have in it? If it says 2.0ohms then there are two 4ohm coils in it. if it is a 1.8ohm setup then you have 2 3.6ohm coils in it. So it requires more power in order to vaporize the juice properly.
So lets say if you had a 1.5ohm dual coil(that's two 3ohm coils), you would need to vape at 15 watts. If your coil is higher ohms than that, then you will need to increase the watts even more. So yes, your watts are too low. At least that's what the chart says, lol. Just go to 15 watts and see how it goes. Good luck. I don't know what the amp limit is for the mvp off hand.