Mouse clicks on client not working

Hi,

I purchased Synergy a few days ago and right from the start I've had issues with the mouse clicks not always working on the client machines. I have to go to the server software and click "apply"
to re-start the service, this works for a short time, but then I am back with the "no click on client issue" so I have to click apply again, and on it goes...
this is a real pain, and makes this otherwise very useful software into something I keep wondering if it was worth it, add to this that the mouse movement on the client machine is also a little jittery?

Please help.

I didn't find the right solution from the Internet.

References:-
bit.ly/2kg8GmB
Web animation company

Thanks