sto cercando di far funzionare un include

ho un variabile dove prendo la patch del sito e poi vorrei metterla in un include, come faccio?

index.php
Codice PHP:
$path_sito = "http://www.miosito.net/demo/cms2";

include ($path_sito . "/include/page.php"); 
così non va e mi da sto errore

codice:
Warning: include() [function.include]: URL file-access is disabled in the server configuration in /web/htdocs/www.miosito.net/home/demo/cms2/index.php on line 23

Warning: include(http://www.miosito.net/demo/cms2/inc...onnessione.php) [function.include]: failed to open stream: no suitable wrapper could be found in /web/htdocs/www.miosito.net/home/demo/cms2/index.php on line 23

Warning: include() [function.include]: Failed opening 'http://www.miosito.net/demo/cms2/include/page.php' for inclusion (include_path='.:/php5/lib/php/') in /web/htdocs/www.miosito.net/home/demo/cms2/index.php on line 23