Forum:Please help!

Hi,

Just wondering if anyone can help me, as I've gone through the campaign for mw3 a number of times on veteran, but for some reason, I haven't got the achievement for completing Black Tuesday and Hunter Killer on veteran.Bit of important info too, I don't have an internet connection to my xbox. I've got all the other campaign achievements, but it's just this one I'm not able to get. Please help me!