Logic says there is something wrong with that adapter. Try your friends again just to confirm. If that adapter works and yours still does not, perhaps you can exchange it for another one. Here's where a DVM would come in real handy though.
hia all, iv got a pc and bought a new drive......wich also needed a small wire to conect the power suply to the hdd....(molex to sata converter)....wich i borowed from a friend of mine.....so then i formated and installed wind xp......and it worked fine.......after a few days i dicided to by one ov thos wires (molex to sata) of my own.........so i inserted it and gave the other wire back to my friend.....but the pc wont recognise the hdd.....so what can i do???