Hi Donovan,
What formula are you on? How many cans/night do you take? I just received a Mic-key tube and I've gained a lot of weight with it. It really depends on the formula you take. I take Peptamin 1.5, 4 cans/night. I get 350 cals/can, times 4 = 1600 calories per night.
Also, try running it as fast as comfortable. I run mine at about 150 ml/hr. Starting it early would also help you have more of an appetite during the day.
Good Luck!