Can't set lock screen wallpaper

Qypav

Honorable
Dec 23, 2013
11
0
10,560
I have a Galaxy S2 with Android 4.1.2
Whenever I try to set my wallpaper for the lockscreen it doesn't work. It asks me to crop the image, which I do, after that it saves the cropped image but doesn't set it as wallpaper. Why?