DBI is found on a standard ActiveState repository, first check (by 'rep') if the 'ActiveState PPM2 Repository' and/or 'ActiveState Package Repository' are configured as repositories on your installation.

If you need proxy to access the internet, verify the http_proxy variable is configured, or if your proxy require user and password, you nust set this information or configure you proxy to not required authentication for the site 'http://ppm.ActiveState.com'.