imagecreatefrompng() from URL Wrong!

Hello php4beta, I use imagecreatefrompng() open file in my localhost; ************************************************** imagecreatefrompng("/home/httpd/html/powered.png") ************************************************** It can be work, when I use ************************************************** imagecreatefrompng("http://localhost/powered.png") ************************************************** It return: <font color=ff0000><br> <b>Warning</b>: ImageCreateFromPng: Unable to open http://localhost/poweredby.png for reading in <b>/home/httpd/html/i.php3</b> on line <b>3</b><br> </font><font color=ff0000><br> <b>Warning</b>: Supplied argument is not a valid Image resource in <b>/home/httpd/html/i.php3</b> on line <b>4</b><br> </font><font color=ff0000><br> <b>Warning</b>: Supplied argument is not a valid Image resource in <b>/home/httpd/html/i.php3</b> on line <b>5</b><br> </font> What's wrong with me ? Sorry for my english so poor! -- Best regards, php mailto:php_list@citiz.net