If u would to like to enable remote desktop remotely. u need to change the registry settings of the remote computer.
Change the registry settings of the remote Computer
1. Open Registry editor then --> go to file menu
2. click connect network registry -- then type remote computer IP address or name then click ok.
3. now u need to go HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server, in the right panel, seelct fDenyTSConnection (REG_DWORD). Change the value data from 1 (Remote Desktop disabled) to 0 (Remote Desktop enabled).
4. now u able to access the computer remotely.. cheers...