I got all my games on my harddrive and they all work fine, the games i used to put them on there were either copies or original of which all worked fine. the problem is when i use wbfs manager to extract a iso onto my pc, everything goes fine and it copys to disc fine but when i try to play the game off disc sometimes it doesnt work, i use the newest version of neogamma and even the little video plays in the top left game loader on the main screen.

any ideas why this is happening, i say more then half the games i extract work fine but the rest done.