I have migrated a Drupal site to a new hosting environment and am trying to get it configured to match the original site. I have not yet changed the DNS details for the domain, so the dev site is accessed with a temporary URL, e.g., http://###.###.###.###/~account. I can bring up the site itself (images are missing because of that temp URL) but cannot enable Clean URLs. The 'enable' button is not enabled, and I'm seeing a message that they cannot be activated because the server doesn't support it. I have the .htaccess file in place, and see that the server is running PHP5.4x.