Remote destop connection of Windows server 2003 R2 machine

Plz. tell how to configure remote desktop on windows server 2003 R2 machine to share a common session. Presently if Remote Desktop is opened using the same login /password which is alraedy logged in the local console, on Remote Desktop it’s starting a new session not the current session. I want the same session which is already present on the server before Remote Desktop session is opened. Plz guide.