If you are really serious about trying to pack on some muscle then you need to make sure you are doing the following:
*EATING IN A CALORIE SURPLUS
*EATING AROUND 1G PROTEIN PER POUND OF BW
*GETTING ENOUGH SLEEP
*INCORPORATING PROGRESSIVE OVERLOAD
*DRINKING LOTS OF WATER
If you do these things, over time, you will start to see some solid muscle growth. Now remember it can be a long process. So be patient and keep consistent, and the results will come!