go to people selling computer/electronics parts, ask them for 9 pin female ( with holes) serial/com plugs, not molded ones. the 9 pin at the back of PCs are male because they have pins. remember pins (male) must go into holes ( female). you need to do some soldering or ask that electronics man near your house to do it for you. get some flexible but insulated wires, connect pin 2 of the first female plug to pin 3 of the second, the pin 3 of the first plug to pin 2 of the second, then pin 5 to pin 5 of the second. you have crossed rs232 cable.remember connect the ground(metallic parts) of the two plugs together.for you to test, connect it btween your receiver and your pc, use hyperterminal service in your windows xp, vista.switch off and then on your receiver, the software version of your receiver will be displayed in the hyperterminal window