[appfuse-user] Access Denied: Only administrators are allowed to modify other users

[Su]

 Hi All,
I'm new to appfuse.
I add a new field in User.java,
I'd like to change the field by other user.
But It shows that "Access Denied: Only administrators are allowed to modify
other users".
Is there any way for a user to change the field by other user?their role are
both user.
Maybe create a listener for admin to monitor?
Please hint,
Thank you very much,
Mark Su