I'm having the same exact problem. I can't do anything but stand around because Sally doesn't come out of the teleporter you have to activate, so she can unlock the dang door.
I just bought a memory card, and moved my profile from my hard drive onto it. I did this so I could play on my friend's xbox and still get my achievements. The only problem is (even though I moved my profile onto his hard drive and signed in to my gamertag while playing) I'm not getting any achievements, my friend gets his but I don't get mine. What am I doing wrong?
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