Problem in accessing an XML Node which is retrieved using REST web service

Problem in accessing an XML Node which is retrieved using REST web service

Hi,

I am creating an application that gets the data with a REST call using "get url" function.I am passing some parameters
as query strings along with the REST URL.

I am able to get the response xml.But could not access the value of different nodes of that xml.

Below is my response xml,

<?
xml version="1.0" encoding="utf-8"?>

<ResponseArray

 xmlns="urn:mdWebServiceAddress" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<Version>

2.0.56</Version>


<TransmissionReference> </TransmissionReference>

<Results>

 </Results>

<TotalRecords>

1</TotalRecords>


<Record>

<RecordID>

1</RecordID> <Results>AS01</Results>


 </Record>


</ResponseArray>


Below is the code written,

mapvar = getUrl("https://xxx:",false);
stringdata = mapvar.get("responseText");
xmldata = stringdata.toXML();
strdata = xmldata.executeXPath("/ResponseArray");
input.Multi_Line = strdata;

I got the response xml correctly, but in the below line when i tried to access Response array node
strdata = xmldata.executeXPath("/ResponseArray");

No data is retrieved by executexpath and null data is stored in strdata.How to access that root node
 "ResponseArray" ,

please help me in solving this problem