I was building a TDM Map for my server, I decided to make little islands to battle on. so I got some terrain bricks and started to build a base, a few volcanos and lava lakes, I saved and closed the game for a while. when I came back and loaded my build the island was gone! I checked my brick menu and saw that there are no terrain bricks, I re-installed BL but that didn't help. I'm desperate what do I do?