new existing extension not install in magento

new existing extension not install in magento

References

Reference NO 1

http://stackoverflow.com/questions/15195744/new-existing-extension-not-install-in-magento

Reference NO 2

http://www.magentocommerce.com/boards/viewthread/69481/

Reference NO 3

http://extensions.activo.com/installation.html

Reference NO 4

http://www.siteground.com/tutorials/magento/magento_connect.htm

Reference NO 5

https://support.zendesk.com/entries/22329981-Magento-Integration-Installing-the-Zendesk-extension-for-Magento

Reference NO 6

http://magentoexpertforum.com/showthread.php/10073-How-to-install-a-Magento-Theme

Reference NO 7

http://go.magento.com/faq

Reference NO 8

http://blog.magikcommerce.com/how-to-install-magento-extensions-magento-extension-installation-guide/