1. Activate at farm level:
a. http://YourBox:33333/_admin/ManageWebAppFeatures.aspx
2. Activate at Site Collection level:
a. http://moss1/sites/YourSite/_layouts/ManageFeatures.aspx?Scope=Site
3. Activate at Site level :
a. http://moss1/_layouts/ManageFeatures.aspx?Scope=Site
b. http://moss1/_layouts/ManageFeatures.aspx
4. Activate at subsite level:
a. http://moss1/sites/YourSIte/SubSite1/_layouts/ManageFeatures.aspx
5. Turn feature on.