Data Services RFC connection

Hi,

I'm trying to do a connection with my Data Services 4 and SAP BW 7.3, after create the Data services Data Source on BW, i'm going to RFC Server interface connection on Management console and trying to add a connection as described on this wiki http://wiki.sdn.sap.com/wiki/display/EIM/Run+the+DataServices+3.2+RFC+Server,

No error is faced, but my list of RFC server interface status is empty and so, I can't do the connection.

Any idea of how to solve that?

Thanks,

Rodrigo.