Populating Service Activity Fields in 4.0

Need help. Below is the code. We creating a new entity in our 4.0 environment and when we create a Service Activity off of it we need a field called Primary Account populated. With the code below it populates a new account but doesn't pull in the account listed on the project. 

//-------------------------------------------------------
// -- Populate Appointment Fields - Project	
//-------------------------------------------------------

if (regardingType == 'new_project') // Regarding is an Project
{
	
	// Populate Primary Account  ------------------------------------------------------------
	var serviceLocation = prependOrgName("/ISV/CRMServices/CrmRetrievalServiceIndustry.asmx");
	var soapXml='<?xml version="1.0" encoding="utf-8"?>';
	soapXml+='<soap:Envelope xmlns:xsi="www.w3.org/.../XMLSchema-instance" xmlns:xsd="www.w3.org/.../XMLSchema" xmlns:soap="schemas.xmlsoap.org/.../envelope">';
	soapXml+='<soap:Body>';
	soapXml+='<retrieveRegardingObjectInfoOpportunity xmlns="http://tempuri.org/">';
	soapXml+='<regardingObjectGuid>'+crmForm.all.regardingobjectid.DataValue[0].id+'</regardingObjectGuid>';
	soapXml+='</retrieveRegardingObjectInfoOpportunity>';
	soapXml+='</soap:Body>';
	soapXml+='</soap:Envelope>';
	
	var xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
	xmlhttp.open("POST", serviceLocation, false);
	xmlhttp.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
	xmlhttp.setRequestHeader("Content-Length", soapXml.length);
	
	xmlhttp.setRequestHeader("SOAPAction", "tempuri.org/retrieveRegardingObjectInfoOpportunity");
	
	xmlhttp.send(soapXml);
	
	// Get Values from XML Doc
	var xmlDocumentYo = xmlhttp.responseXML;
	var custIDTags = xmlDocumentYo.getElementsByTagName("new_accountid");
	for (i=0; i < custIDTags.length; i++)
	{
	var primaryAccountGUID = xmlDocumentYo.getElementsByTagName("new_accountid")[i].childNodes[0].nodeValue;
	var primaryAccountName = xmlDocumentYo.getElementsByTagName("new_accountid")[i].getAttribute('name');
	}
	
	//Create an array to set as the DataValue for the lookup control. 
	var lookupDataPA = new Array(); 
	//Create an Object add to the array. 
	var lookupItemPA= new Object();
	
	lookupItemPA.id = primaryAccountGUID;

	lookupItemPA.typename = 'account';
	lookupItemPA.name = primaryAccountName;
	
	// Add the object to the array. 
	lookupDataPA[0] = lookupItemPA; 
	
	crmForm.all.rsd_primaryaccountid.DataValue = lookupDataPA;
	
	// Resources (Owner of the Account)
	var xmlDocumentYo = xmlhttp.responseXML;
	var custIDTags = xmlDocumentYo.getElementsByTagName("ownerid");
	for (i=0; i < custIDTags.length; i++)
	{
	var OwnerGUID = xmlDocumentYo.getElementsByTagName("ownerid")[i].childNodes[0].nodeValue;
	var OwnerName = xmlDocumentYo.getElementsByTagName("ownerid")[i].getAttribute('name');
	}
	
	//Create an array to set as the DataValue for the lookup control. 
	var lookupDataOwner = new Array(); 
	//Create an Object add to the array. 
	var lookupItemOwner= new Object();
	
	lookupItemOwner.id = OwnerGUID;
	lookupItemOwner.typename = 'systemuser';
	lookupItemOwner.name = OwnerName;
	
	// Add the object to the array. 
	lookupDataOwner[0] = lookupItemOwner; 
	
	//crmForm.all.resources.DataValue = lookupDataOwner;
	crmForm.all.resources.DataValue = crmForm.all.ownerid.DataValue;

	
	// Populate Primary Account END ----------------------------------------------------------
	
}

//-------------------------------------------------------
// -- Populate Appointment Fields - Project END
//-------------------------------------------------------