So my 2004 disco locks seem to all lock fine. The two rear doors lock with one press of the button and then the two front with another press of the button but non of them will unlock. Did all my lock actuators finaly fail or is this in some sort of program mode that can be changed? It sounds like they are trying to unlock but the interior lock button stays down and doors remain locked. Could voltage be related to this? I guess this would explain why my M and S lights flash in Reverse as well?