Nakisa OrgChart : Prob : Cannot find the root of your orgchart

Dear Expert,

I got a problem while I'm configuring Nakisa Orgchart. Need expert advice...

The company using :

- Nakisa orgchart version 4.0/SAP_Live_RFC

- Authentication Mechanism : Logon Screen

- Employee source : UserPopulationInfo /UNAME/UserID/UserID/AUTHFIELD(Object ID)

- Authentication Setting --> Role Mapping : Have user id and password

- Data connection --> Erase user id and password

I used the same configuration on server development, It's going smoothly without any error, but when it go to server production I faces an error messages. "Cannot find the root of your orgchart......." for user id who doesn't have authorization SAP_ALL.

Kindly Help.....

Thanks