I'm trying to add a floor to a house and I'm getting stuck in Build/Buy Mode. I got some things done, no problem, but at some point it won't let me leave Build/Buy Mode to go back to Live Mode. That, in turn, means I can't save what I've done. When I click the Live Mode button, the cursor just spins until I finally force the game down with the Task Manager. I've restarted the game and my computer several times, but it's not improving. Before, I could at least get a couple of things done before it froze up, but now it's doing it every time I leave Live Mode. Anyone have any ideas about this?