Jan Boehm

Hello everybody, first of all, excuse my english, german guy : ) Since i am a new Leap Frog User i habe a problem with the submasters. When i try to record for example CH 37-39 from the preset B Bank to one of the submasters, nothing happens. When i do the same with the channels on Bank A, all channels are stored the way i chose them? Where is my fault? Thanx in advance Jan