How many calories are you eating right now? In general terms, a person of your weight ought to be eating at least 1500 - 1600 calories to increase mass. But it also depends in part on your activity level, genetics, etc., so you need to play around with the numbers.
A good way to start is simply increasing total daily calories by 300 - 500 (assuming you are maintaining your present weight with your current calorie consumption).
If you have no idea where to begin, try a 40/40/20 (Pro/Cho/Fat) calorie split. Again, it takes experimentation to find the right split for every individual.