September did you say? Courage dear, it is way too early. Besides, supervisors everywhere are a strange breed, always busy when you need them, I should know, I have FOUR of them and they never seem to agree on the simplest of things like how many chapters I should write. Try e-mail, it works for me, they just can't ignore it. Plus writing gives you control over what exactly you want from them. Just bullet out what you want to tell them and indicate where you need each one's input. Hope it helps. Ta!