Neverwinter nights unecpected error

hi everyone, i had a copy of neverwinter nights from a few years ago and i could install it but i could never start it up because of the protection on the disk but i got a copy of it and i installed it and tried to play it, then it kept asking for a me
to insert the play disk which was in so i decided to update it and is still didnt work the problem is that when i tried to load it up it comes up with an error message to inform would be greatly appreciated. thanks