Can’t retrieve all data from soap exception

Hi,

I’m trying to retrieve information from a soap exception.  The webservice returns something like this:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <soap:Body>
      <soap:Fault>
         <faultcode>soap:Server</faultcode>
         <faultstring>Exception of type QM.Exceptions.QMException was thrown.</faultstring>
         <faultactor>url removed</faultactor>
         <detail>
            <error>1201</error>
            <message>Cannot find group.</message>
         </detail>
      </soap:Fault>
   </soap:Body>
</soap:Envelope>

Using the exception object I would like to retrieve the error en message segments.
soapException.Message + soapException.Detail.InnerXml; 

Return this: 

An error occurred while processing the message, refer to the details section for more information

Message ID: {7D52DBBB-55DE-4E59-B2A2-451DF262A2B7}

Instance ID: {4A356227-699A-4DF2-A52C-9B37692B5202}

Error Description: SoapException: Exception of type QM.Exceptions.QMException was thrown.



<ns0:NACK Type="NACK" xmlns:ns0="http://schema.microsoft.com/BizTalk/2003/NACKMessage.xsd"><NAckID>{7D52DBBB-55DE-4E59-B2A2-451DF262A2B7}</NAckID><ErrorCode>0xc0c01f07</ErrorCode><ErrorCategory>0</ErrorCategory><ErrorDescription>SoapException:
Exception of type QM.Exceptions.QMException was thrown.

 </ErrorDescription></ns0:NACK>

Can anybody tell me how I can access this data: 
<error>1201</error>
<message>Cannot find group.</message>


Thanks in advance,

Bart