when i start the sampleNFT -an already made example from ARToolkit- in unity Editor -pressing play button- it worked greatly BUT when i build my android app it removes my NFT marker which is in this case "gilbratar" and i made the player setting and Android manifest as good as it supposed to be ! BTW i'm using Unity 5.3.0f4 and ARToolkit 5.3.1
why i have this problem ?!
check this image for more info