保存UIDocument到iCloud给我NSCocoaErrorDomain Code=4

in my app i want write document on iCloud, but i have a problem with one iCloud account, this is the scenario: iCloud Account A, all works perfectly, i can write and read, with iPad and iPhone. iCloud Account B, same as above, i can write and read. iCloud Account C, doens't work, i can't write and read and give me the error.in my app i want write document on iCloud, but