Problema ao trabalhar com XML

Estou tentando pegar dados do SHOUTCAST, no arquivo XML que o SHOUTCAST gera com as informações...

Segue meu código:

<?php
$radiowp = array();
 $xmlradiowp = array();
 $error = 0;

 $queryStatus = db::Assoc(db::Query("SELECT * FROM radio_dados ORDER BY id ASC LIMIT 1"));
 $ipwp = $queryStatus['ip'];
 $portwp = $queryStatus['port'];
 $ippwp = $ipwp.":".$portwp;
 $passwp = $queryStatus['senha_radio'];
 // Change IP_RADIO_PORT to your <myradioip>:<port> and RADIO_PASS to your <adminpass>
 define($ipwp.":".$portwp, $ipwp.":".$portwp);
 define($passwp, 'xxxxx');

 // Url of admin area in shoutcast
 $file = 'http://'.$ippwp.'/admin.cgi?user=admin&pass='.$passwp.'&mode=viewxml&sid=1';

 // Retrieving shoutcast radiowp
 if(!$xml = simplexml_load_file($file))
 {
 // If something goes wrong, keep the error message
 $error = 1;
 $radiowp['message'] = 'Ops, o servidor caiu! Rapidinho consertamos, volte em breve!';
 }

 // If nothing went wrong...
 if($error < 1)
 {
 // Convert xml to array
 $xmlradiowp = xml2array($xml);

 // Uncomment to see all information retrieved
 // print('<pre>'); print_r($xmlradiowp); die;

 // Check if server is up
 if($xmlradiowp['STREAMSTATUS'] == 1)
 {
 $radiowp['locutor'] = $xmlradiowp['SERVERTITLE']; // Radio Title
 $radiowp['radiourl'] = $xmlradiowp['SERVERURL']; // Radio Url
 $radiowp['radiogenre'] = $xmlradiowp['SERVERGENRE']; // Radio Genre
 $radiowp['nowplaying'] = $xmlradiowp['SONGTITLE']; // Now playing
 $radiowp['nextsong'] = $xmlradiowp['NEXTTITLE']; // Next song in queue
 $radiowp['listeners'] = $xmlradiowp['UNIQUELISTENERS']; // How many is listening right now
 $radiowp['songhistory'] = $xmlradiowp['SONGHISTORY']['SONG']; // Song history
 }
 else
 {
 // If server is down, keep the error message
 $error = 1;
 $radiowp['message'] = 'Ops, o servidor caiu! Rapidinho consertamos, volte em breve!';
 }
 }

 /**
 * [http://www.php.net/manual/en/ref.simplexml.php#111227](http://www.php.net/manual/en/ref.simplexml.php#111227)
 * @param unknown $xmlObject
 * @param unknown $out
 * @return unknown
 */
 function xml2array ( $xmlObject, $out = array () )
 {
 foreach ( (array) $xmlObject as $index => $node )
 $out[$index] = ( is_object ( $node ) || is_array ( $node ) ) ? xml2array ( $node ) : $node;

 return $out;
 }
 ?>