LCD No Touching Ability :( HELP PLEASE ...

Ive been using this lcd for a month , got the proper libraries and work it well. Im almost done with my project then suddenly I got this problem. My touchscreen lcd didnt recognize my touch :( I have 3.5 inch lcd from mcufriend. Display is ok . Only lcd touch got a problem. Help me anyone please... Even sketches like UTFT Quick paint has no touching ability :( Its okay before... :(