Comment 4 for bug 509556

I'm sorry to hear Ubuntu One isn't working properly for you. Can you try the following and let us know the results?

   1. Quit the Ubuntu One client
   2. Open Applications->Accessories->Passwords and Encryption Keys
   3. Click on the arrow next to "Passwords"
   4. Right-click on the Ubuntu One token and select "Delete"
   5. Go to https://one.ubuntu.com/account/machines/
   6. Click on the checkbox next to your computer
   7. Click the "Remove selected computers" button
   8. Open Applications->Internet->Ubuntu One
   9. a web page should open, prompting you to add your computer to your Ubuntu One account
  10. Add your computer

You should be connected after you follow these steps. If you are not connected, can you please attach the following files to this bug report?

~/.cache/ubuntuone/log/oauth-login.log
~/.cache/ubuntuone/log/syncdaemon-exceptions.log

Thank you,
duanedesign