fatal error when trying to use structmem();

Here's my php code:

<?php
require_once('xmlrpc/xmlrpc.inc');
$xmlrpc_msg = new xmlrpcmsg('examples.getallheaders');
$vidClient = new
xmlrpc_client('/server.php','phpxmlrpc.sourceforge.net',80);
$resp = $vidClient->send($xmlrpc_msg);
if (!$resp->faultCode()) {
	$myList = xmlrpc_decode($resp->value());
	$vidTitle = $myList->structmem('Host');	
	$Host = $vidTitle->scalarval();
	echo $Host;
} else {
	printf($resp->faultCode());
} 
?> 

When I try to run this I get a fatal error:

Fatal error: Call to a member function on a non-object in
/home/virtual/site303/fst/var/www/html/rpc_test.php on line 8

Line 8 is:

$vidTitle = $myList->structmem('Host');



Any ideas why this might be happening?






 
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