Twitter login not working--need request token

I created my Twitter app to allow people to register to my events using Twitter. The API settings ask for the Consumer Key and Consumer Secret, which I entered but when I test the button, it tells me that "there is no 'request token' for this page."

I know I created a request token because I can see it in the app settings but there is nowhere on my WP site settings or Event settings where I can enter a request token. What am I doing wrong??