[a33ik]

Сравнил Ваш код с этим. Есть отличия. Попробуйте использовать такой код:

var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
var soapXml = "<?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'>" +
	GenerateAuthenticationHeader() +
	"<soap:Body>" +
	"<Execute xmlns='http://schemas.microsoft.com/crm/2007/WebServices'>"+ 
	"<Request xsi:type='SetStateLeadRequest'>" +
	"<EntityId>" + leadId + "</EntityId>" +
	"<LeadState>Qualified</LeadState>" +
	"<LeadStatus>3</LeadStatus>" +
	"</Request>" +
	"</Execute>"+ 
	"</soap:Body>" +
	"</soap:Envelope>";
try {
	xmlhttp.open("POST", "/mscrmservices/2007/CrmService.asmx", false);
	xmlhttp.setRequestHeader("SOAPAction", "http://schemas.microsoft.com/crm/2007/WebServices/Execute");
	xmlhttp.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
	xmlhttp.setRequestHeader("Content-Length", soapXml.length);
	xmlhttp.send(soapXml);
	var result = xmlhttp.responseXML.xml;
	if (result.indexOf('faultcode') < 0)
		crmForm.SubmitCrmForm(1,true,true,false);
	else
		alert(result);
} catch(e) {
	alert(e.description);
}