Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: It didn't work.

I have a two year old Sony cassette player in my car. I tried my new Monster Cable Cassette Adapter with my 40 Gig iPod, and the adapter would not play in my Sony. The cassette player works fine with tapes, and just to make sure it wasn't the cassette player, I popped in tapes and they worked fine. After the tapes I tried the adapter again, but it would not work. I adjusted the volumes on the iPod and the cassette player. I tried a few other things, but I had no success.