Why won't it let me play Action Sack?

So me and my brother were just playing Halo 3 for old times sake. And whenever we wanted to play Action Sack, it would load up the map, and then boot us back to the Lobby.

It didn’t give us any warning. It just abruptly does that.

Can someone help?

It might be that your disc is scratched. That used to happen with my original h3 disc.

I don’t know if it’s just me, but the ODST multiplayer discs are just terrible. I bought ODST twice because the multiplayer disc broke. It wasn’t my fault, I kept it in the console at all times. I never moved the console while it was running and I never played way too much in one session. I ended up just using the original Halo 3 disc and buying the Mythic Map Pack II. So, you know, if you’re using the ODST multiplayer disc, it may just be messed up. You will get booted from the game if you can’t load the map, and I guarantee that’s why you’re having the problem.