[saaby]

Last year my team was using two bricks (in case one failed in competition). We had similar issues. First try having only the brick you wish to connect to on. So if you want to connect to brick C, A and B should be off. Even if you have already connected to a different brick this should work. If not then try going into the blue tooth settings in the control panel and deleting the NXT device you just connected to. Then turn off all of your bricks. Turn on only the one you wish to connect to and search for it with blue tooth. This was worked for our team every time. The key (I think) was deleting the device from the saved blue tooth device list.