Check the system requirements on the product page. Obviously something is not compatible on your end. For more ask in the PPro forum.
Moving this discussion to the Premiere Pro CS5, CS5.5, & CS6 forum. Did you receive any error messages when installing the software? You can find information on how to review the installation logs at Troubleshoot with install logs | CS5, CS5.5, CS6 - http://helpx.adobe.com/creative-suite/kb/troubleshoot-install-logs-cs5-cs5.html.