Switch between 2 WoW Session

Hi,

i am new to this forum and i have got a question. Since the last restart of my PC there is no more automatic switch between my two WoW sessions when i move my mouse to the second window and back. I play two sessions and have them behind each other, so the toon is in the Background with a small overlap so i can grab stuff with the toon when the window comes to front and goes back when i move my mouse to the main Window. How can I fix it, that the windows swap automatic again?

regards
ThaNeub

Are you using a key broadcasting software (KeyClone, ISBoxer, HotKeyNet)?

Yes I use keyclone for key broadcasting.

I think that would be the "focus follows mouse" option in the keyclone settings.