Ahrr, there is the problem.......they dont work with 64 bit, they will work faultlessly with 32 bit.
I feel 64 bit is a bad system for add ons as there is little support with drivers for the average stuff.
I know of many people caught out with upgrading to 64 bit and very little of their equipment will work with it and often no drivers available to suit.
Nothing wrong with the cable just donate it to someone using 32 bit.