I downloaded the new Uprising maps. When it came time to play Magma on live, the Xbox locked up and could not be restarted by the remote, only manual turn off via the box button. This happened several times so I deleted the uprising maps off the hard drive and downloaded it again. All of the maps work except Magma which still locks up the box. Any suggestions? I have an older Xbox with the disk drive attached. I also have 11.0 Gigs of space left. Thanks.