Archive your Twitter conversions in your database, and use your free web texts to receive sms notifications.
If things don't work when you installed the plugin here are a few things to check: 1. Wait. The plugin polls Twitter at most every 90 seconds. If you're not seeing any tweets, Twitter might not have been polled yet. 2. Double check that you have a registered application in your Twitter account in Settings 3. Check your access logs for requests for "wp-cron.php". 4. Anything in your php error_log?