Forum:Trouble installing Fallout 3 DLC

I have a used copy of Fallout 3 (GOTY edition) for XBOX360. I've read online that disc 2 can be re-used. I have Fallout 3 installed. Whenever I try to install the DLC, it says 'An update is required to install this expansion pack. Would you like to perform the update?". When I click yes, it starts updating. After the circle goes around two times, it stops and freezes. What's going on, and can someone help me?