You may have been making good use of your Social module and been Tweeting from your InTouch account quite happily. But then you find you can't...
1. Check your Social profile for Twitter and you may see this message:
"Token has expired. Click here to visit Twitter and re-authenticate..."
2. So just click on the link to re-authenticate your Twitter token and you should then be fine.
If you have further questions about your Social module please raise a support ticket to us.