I know this should be simple and I've tried every thing I've searched for and it still won't work. Simply: I hooked my son's ipod shuffle up to my new imac. I want to delete some songs off of his ipod and then put some new ones I just bought (I see them in itunes) onto his pod. Nothing is working. Not dragging and dropping, not hitting delete, not using some of the pull down menus....all the things I read about in the itunes help and from google searches. Can anyone help me?