You're welcome.

If that works you can gradually lower 100 100. I gave you high numbers to find something that works.

The trick to solving problems like this is to find something simple that works. Then gradually add complications. When it stops working, you know the last thing you changed is the culprit.

HotkeyNet doesn't do mouse multiplexing like Synergy. I'm writing a new program now that will do what both these programs do, but it won't be in public beta for a while.

If you're using Scroll Lock in HotkeyNet, that could be the problem with getting the programs to work together. Synergy uses the lock keys for its own purposes, so using Scroll Lock in HotkeyNet makes the programs incompatible.

You don't need to use lock keys with HotkeyNet. There are many other ways of turning hotkeys on and off. For example, you can use <If> statements so hotkeys automatically work only when you're in a WoW window. Or make a <ToggleHotkeys> hotkey. Or hotkeys with <TurnHotkeysOn> and <TurnHotkeysOff>.