setting up Synergy on 2 computers

I hope this is on topic for this forum..

Hello. Im looking for a beginners guide to setting up synergy. (control 2 Pc's with 1 Mouse/keyboard).

ive got a Spark Modem - HG659b (fibre) if that info is needed.

The problem Im having is that ive got synerg set up on two computers - Both look as if they're working however they acnt see aech other

"failed to connect to server: address not found for: 192.168.001.069" _ thats the message im getting on my 2nd computer.

In my configuration (my main PC) i have

0 to 1% of the RIGHT of 192.168.001.069 goes to 0 to 98% of 192.168.001.065.

I am wondering - are my percentages correct ? From what ive found on Google , the pages assume uyou just do 5 steps & it goes(assuming the person knows the other steps in between)

EDIT: i did try to do this by "name" of each computer - didn't work, Ive now got them to use IP addresses - Still didn't work...