I have faced one more problem using WebServices, when I'm trying to call createIssue method it fails with next message:
AHD03301: This operation requires Function Access for Issue_mgr equal to Modify
The strangest thing is that i'm calling this method from user with Admin rights.
I have found 2 users who can call this method: first is ServiceDesk, another is a random guy with L1 Analyst rights.
I have tried to give same rights to others but this gave no result, after all I compared all attributes from contact who have possibility to call that method and who haven't, they are matching (except of personal data sure).