i've had halo 3 since it first came out and i hate beaten the campain on all difficulties. i have also found all the skulls. recently i updated my xbox live account so i can have it for another year. now whenever i start up halo 3 it says i havn't beaten the campain at all. it also says i havn't found any of the skulls. my achievments say i have done everything. so how do i get all my information back without starting the campain over and finding everthing again?