I got it to work finally- this is what i did.
1. moved all the PP1 connector files to an external drive on the network
2. uninstalled PP1
3. reinstalled the PP1 connector files (which required updating from server)
4. reinstalled PP1
5. updated PP1 connector files
6. server connected with first client laptop
I am attempting the first backup on the server and it is taking a long time to backup 100GBs over a LAN through a wireless-N router.