how to set up xcode 8 bot to run with xcode 9 server

I used to have xcode server running on my server,but have recently updated the server to High Sierra and xcode 9. My main development machine is an old Mac Pro 2008 and i cant update xcode beyound 8.2. I have set up xcode server 9 and the tab says its running, but i can not get the bots working in my xcode 8. It finds the server but does not work.enter image description here

the server box has the above. I have searched on the net but can't find anything to help. Any ideas would be appreciated.

Kind Regards