I have a Mori Seiki SH-403 with a 2-station pallet changer. It has been sitting for some time and the pallet change times out before it rotates. The operator shut the machine down in this state. Now every time the machine is turned on, after full power up, the pallet changer arm goes to the up position. I've went into the setting page to manually operate the APC. It will rotate back and forth but won't allow arm to go down. It just flashes on the screen. It recognizes that it's in the up position and that the WSS is in home position and pallet is unclamped and it knows which station is in the machine. When the machine is powered off and hydraulic pressure dissipates the arm goes back down. But goes right back up at power on. Can anyone help?