I plugged in my new Sansa E260 (4 gig) this morn. with one of those cables and only got sound from the left speakers. (very weird)

I checked the balance on the cars stereo. it was proper but I couldn't get sound of the right speaker using the mp3 player.

I checked the settings on the player, they were balanced. the player sends proper stereo sound to the earphones when they're plugged in.

the cable I used I had lying around the house, probably for some time. I can't remember how or when I got it.

Are there versions of these cables that are mono? I will go to the Shack to get a new one, but I can't imagine that there's a mono and stereo version of these cables. Maybe my cable is old and has a short?

any ideas?

tx