Joined: 05/30/09 12:02 AM
Try picking up the lot and placing it back down.
Also it could be that your saved stage set up corrupted. That happened to me a few times and I had this exact issue because of it. I went into the family inventory and sold all of the stage items that I was using. Then I was able to click on the stage. The buy menu came up and I was able to rebuy all of the items again.