#1 Problem. PHP fopen(), fsockopen() and file() for read

[Josema]

Hello, In my project i use the fuctions fopen(),
fsockopen() or file() for read external urls.

The example for my project is a RSS Reader online
http://isixml.sourceforge.net/rss.html

I Use proxy.php for read external urls. But it does not
work
http://isixml.sourceforge.net/proxy.php?url=http://feeds.feedburner.com/ajaxian
http://isixml.sourceforge.net/proxy2.php?url=http://feeds.feedburner.com/ajaxian

See source:
http://isixml.sourceforge.net/proxy.txt
or
http://isixml.sourceforge.net/proxy2.txt

Example running in my personal page:
http://www.murzia.com/cosas/isixml/rss.html
http://www.murzia.com/cosas/isixml/proxy.php?url=http://feeds.feedburner.com/ajaxian

I need support for to make Demos. That i can do?