I have just set up idisk sync on my mac so that I can access files when I have no internet access. When I click on the idisk icon on my desktop I am met with the files that are on the idisk. Some of the files have a little arrow in the bottom left hand corner of them. When I click on these files I am asked for my username and password so that I can access the fileserver as a registered user. I have tried with my mm username and password and also the username and password for the mac itself. Neither work. What else could it be?