My Control Panel will be upgraded to version 4.0.0 in the early hours on December 20th. Control Panel access will be unavailable for up to 2 hours. If you cannot login, please don't panic and frustrated.
I will be working on the upgrade and importing all the accounts from the old database to the new one, so during the upgrade nobody can login. Once the control panel is fully upgraded, you may make changes to your site again.
If you would like to see the improvements of the control panel, you may look at the newsletter that was sent yesterday to the customers on the front page of my web site http://www.yupapa.com