Yes it was, I played with every programming setting on win500, arc500, psredit500 and couldn't get anything to work. I returned the cable to him and then purchased the real RS cable. Hopefully that cable works right away.If this is the cable sold my Mark Dunkle on Ebay, You have to use the Win500Com version of Win500 to get his cable to work. You will need to set the serial port manually under the configuration tab.
Been there, done that for too many hours before I figured it out.