Having android issue please help!!

Hi community, i having a problem, im making a android games, but i dont use the TouchButtonLogic, i simply use the OnMouse_ and Input.GetMouseButton_ , i use that function in alot of my game object, its working perfectly, but when i build and run, when i run my app (after installed it as an apk) my player was lost when i press a button to Instantiate him, i dont know why. he just dissapear, so i add some color quad when i instantiate him so i know if that Instantiate function its working, and there is the quad, but no player,i've working on this for like 2 days and im so sad right now, i have add the player in the scenes too , but it still dissapear. i have put this in the player code:
Input.simulateMouseWithTouches = true;
Input.multiTouchEnabled =false;
but it doesnt work either, Guys please help me. i thanks alot for all helping. Thank you for reading.