In order to activate chat in Orkut, your browser must allow third-party cookies. Check below how to do it:
- Click the Chrome Menu button on the top right.
- Click Settings.
- Click Show advanced options.
- Click Content Settings.
- Leave unchecked the option "Block third-party cookies and site data".
For other browsers, check Orkut browsers compatibility in order to find help.
Once you changed your cookies settings, restart your browser and access Orkut again.