[iggy1]

If you are in a vehicle when you use the command try getting out. Some objects stay invisible (if in a vehicle) until you leave the vehicle. I have only noticed this with some objects added since 0.3c (so not sure if it will help), the col files are loaded but not the textures. The problem [MG]Dimi had is probably from the streamer plugin, it doesn't load newly created objects for players until they move.