Neverwinter nights need help

[Lemoncars44]

Hello I have neverwinter nights 2 and i lost the disc for it. So i downloaded the 1.0 no cd crack and it worked until i came into a glitch throughout the game that i couldnt get passed, so i couldnt get through the game. So i updated the game. Then i couldnt find a crack for it, so i tried the YASU fxed exe thing but the same thing happened. the Disc arrow appears for a bit then it says Disc Emulation software detected or it says The original disc could not be found or authenticated. What should i do? can some one help?