2 :what is the DEF jumper on the back ?
3: the 3 phase setting is that in use ? if set wrong could that result in the x-10 stuff not responding ?
4: the start stop setting lockout time : if i put both to 00.00 is it disabled then ? hope so

the reason for these question is that: the powermax does npt turn lights on/off correctly .. sometimes it works and sometimes not (not even the led on xm10 is flashing) the x-10 stuff is on the same phase and controls perfectly with ir-remote ...