This is a Joomla component. You have all options available to you that Joomla provides. Have you tried FTP'ing the file to your server and installing from there?
All you need to know to install CB is in the installation doc, downloadable in the left side of your screen. It also includes troubleshooting steps to be taken with installs. You can also visit the Help Us Help You link in my signature for more tips.
Lots more information is included in the Documentation Subscription to help you realize all the functions of CB.
For knowledge of Joomla, you'll need to visit their website.
i have completed the update process but when cb installation appears (please do not interrupt installation process in progress....) then after a sec it goes blank and noting happens after that.
what i do plzzzz tellme:(