If you try and use these disks, they will disconnect from XBL as if downloading an update and then crash. I have contacted MS and all they do is send me new disks (currently have 3 of both). A patch to XBL is needed for them to work...it will never happen.
That's pretty odd. The only thing I would suggest trying is to clear your 360's cache and then try again and see if it is still happening.