consuming NAV2009 Webservice via PHP

Hello,

can't consume the NAV-Webservices via PHP nor get the service in soapui running, respectively proper results. adjustet the CustomSettings.config for the webservice configuration "WebServicesUseNTLMAuthentication" to true. so i can access the service via soapui but always get the result:

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"&gt;
<s:Body>
<s:Fault>
<faultcode xmlns:a="urn:microsoft-dynamics-schemas/error">a:System.Net.WebException</faultcode>
<faultstring xml:lang="de-DE">Soap message is invalid!</faultstring>
<detail>
<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">Soap message is invalid!</string>
</detail>
</s:Fault>
</s:Body>
</s:Envelope>

can anybody provide an example how to consume a webservice from within PHP?

Thanks in advance your help is highly appreciated

Kind regards
Bernd