EHID is meant only for those with cockpitsonic hardware.
What hardware do you have?
Also, the client software do not need hardware connect to run, only wideFMGS.
I believe you did install without noticing too many things. It is important to install ONLY what is required on each PC.
So for instance, you MUST NOT install FMGS Server on any client computer.
Also, please DO NOT install any hardware support module unless you need them.