mime_content_type remote file

Hello I am using following to determine the mime_type of a remote file $filename = str_replace("%20", " ",$_GET["image"]); echo "Filetype: ". mime_content_type($filename) . "\n\n\n\n\n\n\n<bR><br><br>"; When I view the link in browser, it's show ok. When i run the script, I get following message: Warning: mime_content_type(REMOTEURL/AMD AM2 X2.JPG) [function.mime-content-type]: failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found The remote file is on a Unix server, I know it's case sensitive. Best Regards Joris Willekens