When the installation of Joomla is not ok you can reinstall uddeIM as often as you like it will not work. "You are not logged in" only appears when a logged in user is not correctly handled in Joomla's framework. So when Joomla does not pass a logged in user to uddeIM, uddeIM denies the access, which is correct.
Use a fresh Joomla setup, maybe ask a user with some Joomla experience to do the Joomla installation, then install uddeIM (the correct package for your Joomla version).
You do not need CB, it works fine without.
uddeIM & uddePF Development
CB Language Workgroup
CB 3rd Party Developer