Only admin can set_cimyFieldValue

Hello, i find your plugin very useful, the best one in its area.

I have a small problem.
I did create a user frontend myself for managing users, and i want to give others than administrators the possibility to update users. In fact a new super user role that i created.

But when i use the function set_cimyFieldValue in my code, it only works, when i am logged in as administrator.

In the administation the settings are “Can be modified”.

Is there some default setting, that only allows administrators to update the extra user fields, or do you know the cause of this problem ?