need advice

My problem is I can’t seem to put on the weight I want..I take DYMATIZE ELITE MASS muscle gainer plus there protien powder and i average at least 200 grams of protien a day but i cant seem to put on lean muscle mass .. I am 5'7 and weigh 165 pounds. I am extremly cut.But I would like to get at least 15 more pounds of solid muscle.. can you help me figure out what Iam doing wrong? I work out 1Hour a day 6 days a week and I eat high protien, low fat, im in between with my carbs.. thanks for your time..