Due to a long-standing bug in the Twitter API, you can not add write support to an app without deleting it entirely and re-creating the app in their system. It

Due to a long-standing bug in the Twitter API, you can not add write support to an app without deleting it entirely and re-creating the app in their system. It will let you change the flag for future users, but there is no way to request the additional privileges from a user if needed. As such, it unfortunately a "good idea" to always create your Twitter apps as read-write. Reference: http://code.google.com/p/twitter-api/issues/detail?id=669 http://code.google.com/p/twitter-api/issues/detail?id=669