hi MakubeX,
Thanks for reply, Actually in middle we are having two horizontal iron rods .when we moving the box box from left to right side , when the box overlap with that two horizantal iron rods the box object has to disable and red color box has to come.And when the box is in red color,by clicking the object does not drop like as this game
"http://www.devily.com/car-ferry" in level-3.
here is my link " https://www.dropbox.com/s/2abcd84w1smm531/test1.capx"