Tiimik

Is there any ways to set spawn in custom room underground for a new game? I have the room ready, but when i set world spawnlocation to the coords, it always spawns me ON the ground when i enter game. X and Z are relatively correct, but Y is always on ground. Does minecraft globally denies spawning underground? Neither world.setSpawnLocation(x, y, z) nor world.getWorldInfo().setSpawnPosition(x,y,z) works for Y level. Can it even be done or what function should be used? Or is there some special trick to it?