How to active Name Server for NWDI

Hello,

I would you to activate name server for ou nwdi.

The SLD is not installed on nwdi, we use a dedicated SLD Server. The SLD url is filled in the development configuration in CM Services.

From the SLD, in the reservation name part, the "Enable this SLD as name Server for NWDI" button is not available :

I have tries to follow this tutorial, but it is designed for netweaver 7.0 :

http://help.sap.com/saphelp_nw70/helpdata/en/2f/a72f41b239a831e10000000a1550b0/content.htm

Does anyone know how to activate this feature ?

I refer to this button :

Thank for help.