Hi,

I have following XML which I need to modify and invoke a http request
I need to select a node but I am getting "Namespace Manager or
XsltContext needed. This query has a prefix, variable, or user-defined
function." Error
I am trying to access the <CUSTOMER/> tag with following code:

requestXmlDocument.SelectSingleNode("/SOAP-ENV:Envelope/SOAP-ENV:Body/
m:MT_MaterialSearchRequest/" + XmlNodeName.CUSTOMER).InnerText
                       = some value;

Please consider following tags before giving answer:
"    <SOAP-ENV:Envelope
"    <SOAP-ENV:Body
"    <m:MT_MaterialSearchRequest

Following is the Xml:

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/
envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <SOAP-ENV:Body>
   <m:MT_MaterialSearchRequest xmlns:m="http://br.eu/tl/v2">
     <CUSTOMER/>
     <SALES_ORG/>
     <DISTR_CHAN/>
     <DIVISION/>
     <SEARCH_RESULT_SIZE/>
     <DEFAULT_SORTING/>
     <RESULT_TYPE>R</RESULT_TYPE>
     <REQ_DATE/>
     <REQ_QTY/>
     <SALES_UNIT/>
     <SEARCH_PARAM_IN>
       <AGG_SEARCH/>
       <COMMERCIAL_CODE/>
       <DESCRIPTION/>
       <WIDTH/>
       <SERIE/>
       <RIM/>
       <LOAD_INDEX/>
       <SPEED_SYMBOL/>
       <PATTERN/>
       <TUBE_TYPE/>
       <BRAND/>
       <HIERARCHY/>
     </SEARCH_PARAM_IN>
     <VISIBILITY_ITEM_IN>
       <ITEM>
         <ITM_NUMBER/>
         <MATERIAL idtype=""/>
         <REQ_QTY/>
         <SALES_UNIT/>
         <REQ_DATE/>
       </ITEM>
     </VISIBILITY_ITEM_IN>
   </m:MT_MaterialSearchRequest>
 </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

I think I have to use XmlNamespaceManager, but I am not getting how do
I use it in this case when there are  following three tags in the
xmldocument.
"    <SOAP-ENV:Envelope
"    <SOAP-ENV:Body
"    <m:MT_MaterialSearchRequest

Thanks in advance,
Anup