i just picked up a samsung galaxy 8.9 and im pretty happy with it except i cant get the screen to lock. I went into settings and picked pattern. I entered a pattern but the configure lock screen still says off. I them tried to enter a pin and still afrer entering a pin it says off. if i try to enter the sub menu called off within the location and security menu it just takes me back to the settings home screen. What am i doing wrong? It shouldnt be thay difficult.