I cannot seem to get my iPod to work with my new Air. I plug it in and nothing happens. I have tried many times. Once or twice the iPod has shown that it is charging but not every time. I have read that a MAc formatted iPod will not work on a PC but that a PC formatted one should work on a Mac. Mine is Formatted for Windows. I have not had a MAc since the early nineties so basically I am new to them. Also tried the only other USB device I have which is a Lacie floppy drive and nothing happens when I plug it in either. Am I just missing something obvious or do I have a faulty USB port? Any suggestions?