Configure Twitter Consumer Key and Twitter Consumer Secret
1) Go to the https://twitter.com/apps
2) Press Create new app button
Fill in the form.
IMPORTANT!
You have to set the callback url like
http://sitename.com/modules/fbloginblock/twitter.php?action=callback
Go to Permissions Tab and set Access: Read and Write
Consumer key and consumer secret - put it all to the admin panel.
And it is working now. Start twitting. Seriously go make a testing tweet or something.