HaloMods "Classic" Read-only Archive

I'm trying to mod the new maps, but I when I FTP it back to the xbox it doesn't load. It just says failed to load the map. All I did was change the weapons, the projectiles and the height of jump. I am able to do it on the old maps. Am I forgeting to do something?

Here.
But it almost sounds as if you want to mod on live....

No, I'm just new too modding, and I want to start off small. I am planning on making a nice mod but I need some practice.