Unhappy Application Not Installed

i would like to install a game(flappy bird.apk). but when i install it. It say "application not installed". I tried to find the solution. I need help because i really want to play this game.
+My phone have rooted
+Model :SGS2 GT-I9100T
+Unknow sources is checked
+First i use odin to update my firmware
but i forget to rest my phone. i rest my
phone after my phone have updated.
then i try to install flappy bird then it look like that.