If you do not see if your contacts are online (if they still appear in gray, as "disconnected"), you may need to adjust proxy settings.
- In Yahoo Messenger, once connected, go to the Messenger menu and choose Preferences.
- In the Category box (left), click Connect.
- Set here your connection settings:
- Choose No proxy option.
- If it does not work then try the other one by one (and restart application each time).
- Click OK, close and reopen the messenger.