iPod Classic suddenly not being recognized in iTunes on MacBook Pro

I just got a new MacBook Pro a few weeks ago, and have had no issues connecting my iPod Classic to it via iTunes. Yesterday, however, my iPod stopped registering in iTunes. I checked in the System Reports on my MacBook, and I can see that the USB Hub is acknowledging that the iPod is there, AND the iPod is charging when connected so I know it's not a connection issue with the cord, however the iPod still isn't registering in iTunes. If I plug up my iPhone, though, it shows up so it's likely not the computer either. My iPod is working fine and has been connecting fine until yesterday morning when it suddenly just didn't apear anymore. I need to fix it ASAP! Help!