When I rebuild my sitemap manually appear this two errors:
Notice: WP HTTP API Web Request failed: couldn't connect to host in /home/diegolop/public_html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2287
Notice: Failed to ping Ask.com: in /home/diegolop/public_html/wp-content/plugins/google-sitemap-generator/sitemap-core.php on line 2204
What I should to do?