I own a Panasonic KX-FPC161 fax machine, and am having trouble getting it to work. I have one line and two numbers. One is for voice, the other for fax. So if someone calls either number, my fax machine rings. What i want it to do is autoanswer if its the fax line calling, and not answer at all if its the phone line. sS far, it either always answers or always not. I've tried all sorts of things, but i can't find the manual, so i'm out of luck. A little help please?