Error message pops up when I try to run a game

[Running_With_Scissors]

Hello. I'm trying to play The Matrix: The Path Of Neo, and i've succesfully downloaded it, installed it, and mounted the image. However, when I try to play the game, an error message comes up saying the wrong disc is inserted. The game shows up on the Game Database, and I think i'm doing everything else right. Can somebody help me or provide a complete walkthough so I can see what i'm doing wrong? Thanks.

Here's a picture of the error message.