Code:
action move_ambsolid(){
	my.ambient = 100;
	my.z = player.z;
	my.polygon = on;
			while(my.x > -1000){
			c_move(me,nullvector,vector(-8*time_step,0,0),ignore_you);
			wait(1);
		}
	ent_remove(me);
}

I've this action that move a solid block (a map entity) in the level.
My problem is that when this action is in the level the player die by touching something that doesn't exist.
When i try to rebuilt the level i've this error:
CRITICAL ERROR
Block outside level boudaries!
Use -bound XXX to incrase size.
Can somebody help me? I reaaly don't know how to!