iPod 4th Gen not recognized by iTunes but...

Hi All,

My iPod 4th Gen will cause iTunes to open (if previously not open) but there is no iPod icon on the iTunes window (on my iMac running 10.9.5). It appears on the desktop as a volume called "My Book". My finder window doesn't see it as a devise. When I eject the "MY Book" the iPod says, "O.K. to disconnect" but when I do so it goes to the select a language window. I select english and it seems to be setup O.K. but it isn't recognized when I connect it as described above...

I have done the restore steps many times, restarted computer and iTunes. I have also held the Menu and Play button while the iPod started up.

Any ideas? Thanks so so much for any help with this!

Michael