Windows 2000 sharing disabled

Hi

I have a Wind 2k Professional desktop with sp4 and latest updates, connected to a domain.
The domain user through which the user log into the system has the administrative rights.
Still in this user profile, the Sharing option is not coming if i right click on any folder.
When i right click on any disk drives, the sharing tab is not there.
Can anyone help?

regards
Suriya