Splinter Cell Double Agent Troubles

I'm having problems loading the Kinshasa level. I was about half way through the level, didn't play it for about a month and today when I tried to play it it froze at the "Loading Content" screen. I tried using the Continue Game button, the Load Game button and tried just loading the level itself so I was just wondering if anyone had a solution.

Try installing the game, and if that doesn't work, take they game to a BlockBuster, or movie rental place and ask if they will clean your game disc for you. That is all I got.