CRM 4.0 Подразделение возможной сделки

[probka]

Добрый день!

Написала код для получения наименования подразделения текущей сделки.

var oAttribute = crmForm.ObjectId;
if (oAttribute!= null)
{

sEntityName = 'opportunity';
GUID = oAttribute;
sAttributeName = 'owningbusinessunit';

var authenticationHeader = GenerateAuthenticationHeader();

var xml = "";
xml = xml+"<?xml version='1.0' encoding='utf-8'?>"+ 
"<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'>"+ 
authenticationHeader+ 
"<soap:Body>"+ 
"<Retrieve xmlns='http://schemas.microsoft.com/crm/2007/WebServices'>"+ 
"<entityName>"+sEntityName+"</entityName>"+ 
"<id>"+GUID+"</id>"+ 
"<columnSet xmlns:q1='http://schemas.microsoft.com/crm/2006/Query' xsi:type='q1:ColumnSet'>"+ 
"<q1:Attributes>"+ 
"<q1:Attribute>"+sAttributeName+"</q1:Attribute>"+ 
"</q1:Attributes>"+ 
"</columnSet>"+ 
"</Retrieve>"+ 
"</soap:Body>"+ 
"</soap:Envelope>";

// Prepare the xmlHttpObject and send the request.
var xHReq = new ActiveXObject("Msxml2.XMLHTTP");
xHReq.Open("POST", "/mscrmservices/2007/CrmService.asmx", false);
xHReq.setRequestHeader("SOAPAction","http://schemas.microsoft.com/crm/2007/WebServices/Retrieve");
xHReq.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
xHReq.setRequestHeader("Content-Length", xml.length);
xHReq.send(xml);
// Capture the result.
var resultXml = xHReq.responseXML;

// Check for errors.
var errorCount = resultXml.selectNodes('//error').length;

if (errorCount == 0)
{
if (resultXml.selectSingleNode("//q1:" + sAttributeName) != null)
{
var owningbusinessunit = resultXml.selectSingleNode("//q1:" + sAttributeName).getAttribute("name");
alert(owningbusinessunit);
}
}
}

Этот код мне возвращает null. Подскажите, пожалуйста, в чем ошибка?