Need help to enable RDP using GP in windows server 2003

Greetings,

I am newbie learning windows servers, I need to enable remote desktop connections to windows machines (Both servers and XP machines) to users who are present in my domain using GPO, I tried to enable it using the 

1. Computer Configuration > Admin Templates > Windows Components > Terminal Services > Allow users to connect remotely using Remote Desktop Services = Enabled

2. Also editied the  Computer Configuration, Policies, Windows Settings, Local Policies, User Rights Assignment, Allow Log on Through Terminal Services.

But still I am not able to enable the RDP for the users in my domain. 

 Let me know how I can do it.

With regards,

Gopinath.

With regards, Gopinath.