Indeed, same situation here. If I use 'Consumer key' and 'Consumer secret' as stated in manual a screen shows up for authorization of my demo app to use my account. After I fill in username and password of my twitter account, another screen appears with message: return to app and enter this PIN to complete the authorization process: 1479013. But if I close screen the application is not connected to twitter: the TAdvTwitter.OnReceivedAccessToken event is not triggered. How to connect to Twitter?