Okay. I'm thinking that mine may be a first generation. It's 16GB and was bought in 2008. If so, and if it can only go to 3.1.3, can it still play through my car stereo?
Also, something that I didn't add to my description of problem is that it DID play when I first purchased the car about 4 months ago. It was only when I tried again this past week after loading lots of music to the car HDD that the iPod would no longer play. At first it gave a message like "reading iPod" or something like that. Then after probably 15 minutes it finally listed the music, but wouldn't play it.
Since it did play at least once, I'm thinking that the car/iPod are compatible, but I may be wrong.
As I said, my daughter's later model iPhone plays in the car. I guess the next step is to take my iPod Touch to the dealership and see if it plays in a different car.
That did it!
Thanks. Further information - What may have created the problem (first it played then it didn't) is that being unfamiliar with the car system I didn't realize that there is a setting "eject the ipod" that I was unaware of. I figured that it was hot-swappable and simply yanked it out. I only saw the "remove" setting while trying to troubleshoot. I may have corrupted a file. Resetting the iPod fixed it.