miloscorp wrote: is CB working in joomla 1.7? it displays an error when i try to install it
No its not - looks like Joomla team has once again broken many third party extensions.
Hopefully things will be fixed when Joomla 1.7 is released (not holding my breath based on Joomla 1.6 experience).
We will most likely have to address this short-coming with new version of CB.