Others unable to access iDisk public folder on iPad
I use my public folder on my iDisk to share files with colleagues, of course. However, two colleagues, one who uses his iPad with a PC and one with a Mac, cannot access my public folder. The outline of the public folder's directory briefly appears, then changes to a splash page for mobile.me, telling them that they have to sign up. This happens whether they use a link I send them from mobile.me or if they just type the "idisk.me.com/username" URL in Safari.
I don't see anyone else having this problem. Is there somewhere i could start looking for a solution?
19" Intel iMac; 17" Apple iMac; Macbook; dual 1.25 G4, Mac OS X (10.6.5)