soap xml reader problem

[Renato Cortes]

hi

im having problem on getting the <session> inner text value using .net

xmlDoc->SelectSingleNode("SOAP-ENV:Envelope/SOAP-ENV:Body/namesp1:createsess
ioncmdResponse/session")->get_InnerText()

here is the sample xml ...

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope
xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/1999/XMLSchema">
<SOAP-ENV:Body>
<namesp1:createsessioncmdResponse xmlns:namesp1="urn:SMITHWS">
<session_result xsi:type="xsd:int">0</session_result>
<session xsi:type="xsd:string">SATA7L4OYEHJ61T10R3L</session>
</namesp1:createsessioncmdResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

and im gettings this error..

Namespace Manager or XsltContext needed. This query has a prefix, variable,
or user-defined function
at System.Xml.XPath.CompiledXpathExpr.get_QueryTree() at
System.Xml.XPath.XPathSelectionIterator..ctor(XPat hNavigator nav,
XPathExpression expr) at System.Xml.XPath.XPathNavigator.Select(String
xpath) at System.Xml.XmlNode.SelectSingleNode(String xpath) at
CSoapClient.CreateSessionID() in
c:\renato\c++\ecpn\ecpnwebtopup\soapclient.h:line 63 at
CTransaction.RequestTransaction(XmlDocument xmlDoc) in
c:\renato\c++\ecpn\ecpnwebtopup\transactionlogic.h :line 64

any form of help will be great!

-thanks
renato