take it slow so that you can do all of your fingerings without thinking. then slowly increase speed untill you find it takes thought to get everything where it needs to be.... stay there till you dont have to think and continue faster untill your thinking again.....etc. you get the pic.

it takes time- dont rush it or you 1) wont have it memorized 2) wont be able to play it correctly with ease and 3) wont have that extra practice.

good luckkk