try whit this action (lite-c)

Code:
action target_act()
{
	set(my,ZNEAR);
	while(1)
	{
		vec_set(temp,vector(screen_size.x / 2,screen_size.y / 2,2000));
		vec_for_screen(temp,camera);
		if (c_trace(camera.x,temp,IGNORE_ME | IGNORE_YOU | IGNORE_PASSABLE))
		{
			vec_set(my.x,target.x);
			vec_to_angle(my.pan,normal);
			wait(1);
		}
	}
}


it will solve the problem. just put your red dot bitmap in your level (every level) and assign this action to it.

every body got some dues in life to pay