im comin out with a mixtape in about a week but i need to know if its alright to use shadowville beats to my lyrics, its for non profit and i plan to give written credit to shadowville.com? any advice? and i purchsed 2 beats on shadowville but when i try to download the proffeional wav.download it says error the  itme u are trying to get is not here or has been moved? helP! i really need those beats! radio station is ready to play my song ?????