Start --> Control panel --> System and Security --> System --> Left hand side Remote settings
--> Remote Tab
--> the Advanced button and that Remote Assistance group must be in disable mode,
--> And in Remote desktop group
... go for 2nd or 3rd.( Allow connections).
...Click Select Users button
Remote Desktop Users Window will open.
If you want to add users click Add button
-->
Enter User name If you remember into that text box and click Check Names button.
if you forger Click Locations button, so that you can find where all users are located.
-->
After that entering users at text box , click OK,
Again Click OK
Click OK.
That's It.