Copy this into your .htaccess file below
# If your site is running in a VirtualDocumentRoot at http://example.com/,
# uncomment the following line:
# RewriteBase /
and above
# Pass all requests not referring directly to files in the filesystem to
# index.php. Clean URLs are handled in drupal_environment_initialize().
Note that the generated rules' settings can be configure at
admin/config/development/performance/boost/htaccess-settings.