XML Sensor Antwort nicht wohlgeformt PE132

Hallo, ich habe ein XML File mit Werten meiner Raid-Disks. Diese möchte ich in PRTG anzeigen lassen. Anbei das PS1 File.

$result = Invoke-WebRequest -Uri "http://micms01.metob2k.local:61220/xml" -ErrorAction SilentlyContinue -UseBasicParsing

if ($result.StatusCode -ne 200){
write-host "<prtg>"
write-host "<error>1</error>"
write-host "<text>HTTP Request Failed</text>"
write-host "</prtg>"
Exit
}

[xml] $xdoc = $result.Content

## Write-Output $result.Content
## Write-Output $xdoc

Write-Output "<prtg>"

foreach ($xmlnode in $xdoc.Hard_Disk_Sentinel.Childnodes.Hard_Disk_Summary) {
Write-Output "<result>"
Write-Output "<channel>$($xmlnode.Hard_Disk_Serial_Number)</channel>"
Write-Output "<value>$($xmlnode.Health)</value>"
Write-Output "<float>1</float>"
Write-Output "</result>"
}
Write-Host "</prtg>"

Es erscheint in PRTG Anwort nicht wohlgeformt. Die Werte stehen aber in der Meldung drin. Anbei das LogFile des Sensors.

Result of Sensor 8572-Data
Data['fastcount'].asString := '0';
Data['valuetype'].asString := '0';
Data['resultfile'].asString := 'Result of Sensor 8572.txt';
Data['windowsloginusername'].asString := 'administrator';
Data['hostv6'].asString := '';
Data['blockedsens'].asString := '';
Data['tlsexplicit_default'].asString := '';
Data['channelnames'].asString := 'Ausführungsdauer'#$D#$A + 
'1'#$D#$A + 
'';
Data['vmwareparams'].asString := '1';
Data['isexesensor'].asString := '1';
Data['windowsloginpassword'].asString := '***';
Data['scriptplaceholder3'].asString := '';
Data['reboot'].asString := '44858.350468206';
Data['scriptplaceholder1'].asString := '';
Data['exeparamshash'].asString := 'da39a3ee5e6b4b0d3255bfef95601890afd80709';
Data['tlsexplicit_port'].asString := '';
Data['monitorchange'].asString := '0';
Data['inerror'].asString := '1';
Data['scriptplaceholder4'].asString := '';
Data['host'].asString := '192.168.30.49';
Data['unit'].asString := '#';
Data['tlsexplicit_ftp'].asString := '';
Data['timeout'].asString := '60';
Data['notonpod'].asString := '0';
Data['momopersistent'].asString := '';
Data['linuxloginpassword'].asString := '';
Data['exefile'].asString := 'micms01raid7.ps1';
Data['lastuptime'].asString := '0';
Data['writeresult'].asString := '1';
Data['reqmsginterval'].asString := '60';
Data['windowslogindomain'].asString := 'metob2k';
Data['tlsexplicit_imap'].asString := '';
Data['channel'].asString := 'Wert';
Data['uptimecount'].asString := '0';
Data['canlinux'].asString := '1';
Data['channelinfos'].asString := '{"1":{"Unit":"oukTimeResponse","CustomUnit":"","ValueLookupName":"","LimitMode":"0","LimitMinError":"","LimitMinWarning":"","LimitMaxError":"","LimitMaxWarning":""}}';
Data['environment'].asString := '';
Data['mutexname'].asString := '';
Data['scriptplaceholder5'].asString := '';
Data['usednstime'].asString := '0';
Data['newpowershell'].asString := '0';
Data['linuxlogindomain'].asString := '';
Data['sensorid'].asString := '8572';
Data['ipversion'].asString := '0';
Data['tlsexplicit_smtp'].asString := '';
Data['scriptplaceholder2'].asString := '';
Data['usewindowsauthentication'].asString := '1';
Data['simulate'].asString := '0';
Data['exeparams'].asString := '';
Data['lastmsg'].asString := '#O132 (<prtg> <result> <channel></channel> <value></value> <float>1</float> </result> <result> <channel>S4X6NF0N302313K</channel> <value>100 %</value> <float>1</float> </result> <result> <channel>S6PUNM0T100958Z</channel> <value>100 %</value> <float>1</float> </result> <result> <channel>S6PUNM0T346477Y</channel> <value>100 %</value> <float>1</float> </result> <result> <channel>S6PUNM0T406148R</channel> <value>100 %</value> <float>1</float> </result> <result> <channel>S6PUNM0T413055E</channel> <value>100 %</value> <float>1</float> </result> <result> <channel>S6PUNM0T402437M</channel> <value>100 %</value> <float>1</float> </result> <result> <channel></channel> <value></value> <float>1</float> </result> <result> <channel></channel> <value></value> <float>1</float> </result> <result> <channel></channel> <value></value> <float>1</float> </result> </prtg> )';
Data['tlsexplicit_pop3'].asString := '';

Datei Result of Sensor 8572.txt

<prtg>
<result>
<channel></channel>
<value></value>
<float>1</float>
</result>
<result>
<channel>S4X6NF0N302313K</channel>
<value>100 %</value>
<float>1</float>
</result>
<result>
<channel>S6PUNM0T100958Z</channel>
<value>100 %</value>
<float>1</float>
</result>
<result>
<channel>S6PUNM0T346477Y</channel>
<value>100 %</value>
<float>1</float>
</result>
<result>
<channel>S6PUNM0T406148R</channel>
<value>100 %</value>
<float>1</float>
</result>
<result>
<channel>S6PUNM0T413055E</channel>
<value>100 %</value>
<float>1</float>
</result>
<result>
<channel>S6PUNM0T402437M</channel>
<value>100 %</value>
<float>1</float>
</result>
<result>
<channel></channel>
<value></value>
<float>1</float>
</result>
<result>
<channel></channel>
<value></value>
<float>1</float>
</result>
<result>
<channel></channel>
<value></value>
<float>1</float>
</result>
</prtg>

Kann mir bitte jemand helfen, wo der Fehler liegt ? Vielen Dank vorab.
Grüße
Olli