Make sure you can ping the server from the client. If you're using a firewall, then you may have to either add an exclusion for the Synergy port (24800) or disable your firewall temporarily.temporarily. **Edit:** From the comments, turns out the answer is to make sure the client screen name on the server configuration is correct.

Make sure you can ping the server from the client. If you're using a firewall, then you may have to either add an exclusion for the Synergy port (24800) or disable your firewall temporarily.