Also, double check that one of the clients may have the broadcast repeater on. I had this happen to me. Totally goofed me up.

Id be cool to see some sort of flag on the side of the screen... say if you have (5) clients running, and (4) are in the background, that the main window have (5) little boxes... to light up green (similar to the current visual). so you can see from your main client if your slaves are indeed set properly, for when you want to or dont want to, have them broadcasted.