404. That’s an error.

The requested URL /bookmarks/mark?op=add&bkmk=http%3A%2F%2Fwww.simplesoft.it%2Fping-sitemap-xml.html%3FPHPSESSID%3D3346f239dce6022b4008a683aa3354f9&title=Ping+Sitemap+XML was not found on this server. That’s all we know.