if the box is up and you hear the beep (audio reminder)... then your round-robin is disabled/suspended. (or keyclone override or do-not-pass override is on)

toggle the hotkey again and your round-robin will be on.

note:
when i said to restart your keyclone... i never said to toggle your round robin hotkey. since the box is up, this implies you hit the hotkey... which suspends the round robin feature and will pass the keys normally.