I'll share with you the settings as I have them in my twitter application, btw I run the 0.9beta version. I assume you have the key/secret in the config.php file (that's in the main directory). So when you log onto your twitter application, go to edit section and fill it out like so:
Application Website: http://hii.co.il/twitt/index.php
Website: http://hii.co.il/twitt/index.php
Application Type: Browser
Callback URL: http://hii.co.il/twitt/index.php/twitter/authorization
Default Access type: read&write
Let me know if it works for you.
Pari