My "preset link " button has stopped working. The relevant preset numbers are displayed on each sequencer but the patterns being played don't match this. Ie if I have seq 1 playing preset 2, seq 2 playing preset 4 and drums playing preset 5 and I press next on the drums (or any other) while "pst link" is on the result is that all the screens display preset 6 yet only the drum seq is actually playing preset 6.