Changing Memo Key Label on a T28 via XML

PHP Code:
function push2phone($server,$phone,$data)
{
$xml = "xml=".$data;
$post = "POST / HTTP/1.1\r\n";
$post .= "Host: $phone\r\n";
$post .= "Referer: $server\r\n";
$post .= "Connection: Keep-Alive\r\n";
$post .= "Content-Type: text/xml\r\n";
$post .= "Content-Length: ".strlen($xml)."\r\n\r\n";
$fp = @fsockopen ( $phone, 80, $errno, $errstr, 5);
if($fp)
{
fputs($fp, $post.$xml);
flush();
fclose($fp);
}
}

$xml ="<YealinkIPPhoneConfiguration Beep=\"yes\" setType=\"config\">\n";
$xml .="<ConfigurationItem>\n";
$xml .="<Path>/yealink/config/vpPhone/vpPhone.ini</Path>\n";
$xml .="<Session>memory13</Session>\n";
$xml .="<Parameter>DKtype</Parameter>\n";
$xml .="<Value>13</Value>\n";
$xml .="</ConfigurationItem>\n";
$xml .="<ConfigurationItem>\n";
$xml .="<Path>/yealink/config/vpPhone/vpPhone.ini</Path>\n";
$xml .="<Session>memory13</Session>\n";
$xml .="<Parameter>Value</Parameter>\n";
$xml .="<Value>1401</Value>\n";
$xml .="</ConfigurationItem>\n";
$xml .="<ConfigurationItem>\n";
$xml .="<Path>/yealink/config/vpPhone/vpPhone.ini</Path>\n";
$xml .="<Session>memory13</Session>\n";
$xml .="<Parameter>Label</Parameter>\n";
$xml .="<Value>DAY</Value>\n";
$xml .="</ConfigurationItem>\n";
$xml .="</YealinkIPPhoneConfiguration>\n";

push2phone("ip","ip",$xml);