my sp will not load from my save game ,xbox just locks up and i have to reboot ,i'm at teh semper fi or die and i have just saved all the marines and after check point i died ,messing about to much and not pay attenuation to what i was doing now im screwed ,think i will have to restart the campaign all over again ,is there any fix or do i need to start again

mp is fine runs sweet just wish we had proper servers and not p2p gaming