I just ran into this situation as well. In Preferences -> Misc, I checked the box next to "Automatically update map projection (recommended for earlier versions of Business Analyst)". After that, I could zoom into a map once, but after that if I tried to pan or zoom any more, it would just snap back to the previous view. I thought I was losing my mind. It wasn't until I saw this thread that I remembered I had changed the setting. After I unchecked the box, I am able to pan once again. BTW, this was using the default Business Analyst 2012.mxd.