hope I am doing this right it is the first time I have posted have a asrock K100n78 mb have 6 sata ports 3 x sata hd 1x dvd rw all shown and working have been trying to add another dvd rw but ports 56 seem to be disabled they show in bios as ide, have tested both dvd drives both are working swapped power and sata cables around all are working so only leaves the ports, any suggestions would be appreciated, in simple terms please