Norton 360 Toolbar 'Share' not working

It has stopped working in both IE & Firefox.

In IE when I try to share any page to FB I get:

This page can't be displayed
  • Make sure the web address http://en-au.facebook.com is correct.
  • Look for the page with your search engine.
  • Refresh the page in a few minutes.
  • Check that all network cables are plugged in.
  • Verify that airplane mode is turned off.
  • Make sure your wireless switch is turned on.
  • See if you can connect to mobile broadband.
  • Restart your router.
Fix connection problems

 

In Firefox, I cannot even 'click' Share, so cannot gt to the FB option to begin with.

Any ideas?