Remote Desktop Disconnected-Windows XP SP2

Hi,

I'm facing a problem,while connecting my Laptop (Winodws XP SP2) using
remote desktop, i always get "The remote computer has ended the connection",
looked on many site, they adviced to change in the registry DISABLEDFS = 0,
and the said registery key was not found in my machine's registery

Any help would be greatly appreciated.

Thanks