Will Docucolor 252 Professional finisher work on Xerox 550

I have a Color 550 with a freeflow server. I was looking for a pro finisher for it, but could not find one. A techie told me to get a docucolor 252 pro finisher and connect that. I did that, upgrade the printer software and the printer did recognize it as a pro finsher. The only problem is the motor on the middle tray of the finisher rums nonstop.

What can I do to resolve this issue? Anu advice will be appreciated.

Here are two pics where the printer shows the finisher.

 

Here is a link to a video of the tray rollers nonstop running.