need help evglobal folding 36v

Hi all,
Im a newbie. lol. anyway i need some assistance getting my bike going. I just recieved an evglobal folding 36v bike from a friend and cant get it to work. I replaced the throttle switch because it was visually broken. The power on it reads full when the battery is charged and empty when i leave it on, which seams normal. My problem is that when i actually go to hit the throttle nothing happens. I am new to this and need some serious help. PLEASE