How to set up Twitter Connect First, you must create a Twitter application by visiting this URL. You must have a Twitter account to create an application. You will be presented with a form asking for some information about your "application": Fill in the form with the following information: Application Icon, Application Name, Application Description You can fill these settings in as you desire to represent your community. Application Website This should be the main URL to your community. For example, we would enter http://webflake.sx/ Organization, Website If applicable, you can fill these in, or leave them blank. For example, we would enter "Invision Power Services" for Organization and "http://www.webflake.sx/" for Website. Application Type This should be set to "Browser". Callback URL This should be set to your community's URL, followed by "/interface/twitter/index.php". For example, we would enter
http://webflake.sx/interface/twitter/index.php
Default Access type This should be set to "Read & Write". Use Twitter for login You must tick this box. Once you have filled in the form successfully, you will be shown a screen, which has two important keys: On your IP.Board installation, go to Admin CP --> System Settings --> Twitter Connect. Toggle the "Enable Twitter Connect" setting to yes, and enter the "Consumer Key" and "Consumer Secret" keys into the spaces provided. Once you have saved these settings, Twitter Connect should be set up successfully on your community.
[source: http://community.invisionpower.com/resources/documentation/index.html/_/tutorials/general-tutorials/twitter-connect-r349]