GameStudio A8 - World Editor question Thread

Hey,

I have created a house, the ground and the sky models in GameStudio A8's MED (Model Editor), and saved them as the default .MDL file. Now, I added the ground and the house to the World Editor, saved it, built the map, and tried to view it, but I can't view either parts. If I add a default cube, it allows me to view it, but I still can't see the house and ground. What can I do?

Thank you for any support. I really wish to find out O.o