1. Is the internet connection working?
2. Check the queue tab to see if there are text messages waiting to be sent.
3. Are the credentials correct from Twilio?  Note: Phone number, SID and AUTH TOKEN to be pulled from Twilio.com
4. Is the text message length under 200 characters and contain only Latin characters?

a. Try using a short message like ‘test’

5. Are the windows firewalls and any 3rd party security programs disabled?
6. Is the internet connection set to home or work instead of public?

a. To change, go to control panel > network and sharing center.  Click on connection type and choose another connection.