i can't get my mates 5th gen iPod to stay connected with my MacBook. It connects for a few seconds, then drops out. it doesn't display an error message though, which is weird. its formatted for windows, but i have successfully connected it to my mac in the past. i have tried restarting the iPod and my macbook, and ive tried a different USB port. the way it is dropping out makes me think something is forcing it to eject, but i can't see anything which would be doing that. the icon stays in iTunes until i restart the program. any ideas?