You do not have a typical Joomla installation. When I tried to see what was different, the system kicked me out, and I ended up on the front end, unable to log in again.
I recommend a clean Joomla installation before trying to install CB, as something is almost definitely changing core aspects of Joomla. Even the administrator menu options are different.
I already did and was able to get in. Still, it is not a conventional Joomla install. Even the administrator icons are different. My recommendation remains the same: Try with a clean installation, or at least uninstall any extension that may be changing core Joomla functions.
lol... I changed the icon pictures manually myself.. I used the core installation, and I'm pretty sure I don't have any modules that have changed any of the core Joomla functions. But okay, I'll disable everything, and try the install and report back.
I found the probably problem... noixACL. It does make changes to Joomla's ACL and you can probably find other threads relating to this problem, here on JP.