The odds of it being a bad cable is one in thousands.

Since we have been selling AFP we have only found 1 defective cable and that person was able to solder it himself in 1 minute. Many people have mailed them to us, but only to discover it was their machines all the time.

The best way to trouble shoot your cable is to try it on another computer. You don't need to install the software, just go into control panel/joysticks and see if you can get any activity. However you must still have your controller powered up.