Place Object From Conveyor

Hi all, i'm not very skilled with RobotSudio, but i've this problem: i made a station with a conveyor created with " create conveyor" with the first robot which pick an object and put it upon the conveyor's object, when the last robot pick this two object named top and bot ( top is attached at bot) and put it on a pallet, bot dosen't remain on the pallet but keep moving as it still stays on the conveyor( same direction and speed). I checked that during this movement bot is attached to the pallet, but i don 't know why it dosen't stop and keep moving. Do you have any idea? Thank you so much for helping. Marco