When using multiple Alesis ADAT-XTs, an Alesis BRC, the Korg 1212 I/O, and the Korg 168RC digital mixer, you must have the latest software version installed into the ADAT and BRC. There have been reported problems with using older software versions. Your ADAT-XT needs to be version 1.06 and the BRC needs to be version 2.04!