[Skunkworks] Joomla and Community Builder problems

Hey skunkworks-erians... I have Joomla 1.5 installed and have installed the Community Builder component However when I try to add some components to Community Builder I get the error - - Error! Could not find a Joomla! XML setup file in the package. - Path does not have a valid package. I have searched in the folder and the XML file exists.Have also tried unzipping the folder and installing it and i get the same error. Suggestions??