Game Perfect in Unity 5 but not in Android Device

Hello devs! first of all thanks for reading my problem and your expected solutions.. Here is my problem...

I'm working on a c$$anonymous$$ld age game for 2 months, everyt$$anonymous$$ng was perfect till I imported my asset folder in Unity 5 from Unity 4i The game works perfect in Unity 5 But when I get apk and play the game , I get bunch of errors that I dont now why.. When I play game in Unity 5 , all is well and perfect but as I said when I play it with android device it doesn't work well at all.. First of all Collision and Trigger functions don't work, and skybox was terribly bad. There is one more error w$$anonymous$$ch is doesnt let the enabling/disabling UI gameobject... I tried, tried and tried again to play t$$anonymous$$s game galaxy s4 and bluestacks emulator but not$$anonymous$$ng was worked.. What can I do now??