Phantom rumble in GC controller

[garbanzo]

I have an official GC controller connected to my PC via a MayFlash adapter. Everythign works fine until I open the Wiimote config window in Dolphin - that causes the rumble motor to kick on in my GC controller. The only way to shut it off is to exit Dolphin and unplug the GC controller.

This is particularly odd since I haven't been able to get rumble to work on my GC controller!

I installed the latest drivers from the MayFlash website but it didn't seem to do anything.

It might be relevant that I also have a MayFlash Dolphin Bar plugged in with a Wiimote synced to it.

Thanks