Need to gain weight

you weigh 63 pounds at 6'1''???

Hi!
In order to gain weight, I would suggest you to carry weights step by step and eat according to the amount of weight you've being lifting.
Gaining weight doesn't happen in a single night. It takes time. So be patient, eat healthy, don't rely on processed foods, have good amount of organic foods and rest. It'll all come good within a month.
Good luck

I ate a lot of nuts, homemade fat shakes with peanut butter, chocolate spread bananas etc etc for 8 weeks plus food 4500/5000kcals a day put a stone on. Now on 3000kcals not really losing the weight

http://community.myfitnesspal.com/en/discussion/10326769/are-you-a-hard-gainer-please-read/p1

Read that

AlexDalton1998 wrote: »

garyggriffin wrote: »

I ate a lot of nuts, homemade fat shakes with peanut butter, chocolate spread bananas etc etc for 8 weeks plus food 4500/5000kcals a day put a stone on. Now on 3000kcals not really losing the weight

I hadn't thought of that! I should've put a stone in my pocket at my weight in!

https://en.wikipedia.org/wiki/Stone_(unit)