There is another page here in the Codex similar to this: http://codex.wordpress.org/Function_Reference/add_submenu_page,

Notice the comma at the end of the URL.

 Thanks, have removed it. mrmist 18:06, 5 January 2013 (UTC)

 Thank you, Mrmist. Akted 10:24, 12 January 2013 (UTC)