Hello, I am going crazy trying to get the element values from XML file which contains elements with namespaces.

Here is the XML file (test.xml)

Code:
<?xml version = "1.0" encoding = "UTF-8"?>
<ipdr:IPDRDoc xmlns:ipdr="http://www.ipdr.org/namespaces/ipdr"
xmlns="urn:broadband-forum-org:ipdr:tr-232-1-0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:broadband-forum-org:ipdr:tr-232-1-0 tr-232-1-0-0-serviceSpec.xsd http://www.ipdr.org/namespaces/ipdr http://www.ipdr.org/public/IPDRDoc3.5.1.xsd"
docId="74697373-6f74-7878-7878-746973736f74"
creationTime="2013-06-11T05:52:55.153Z"
IPDRRecorderInfo="IPDR Collector" version="3.5.1">
<ipdr:IPDR xsi:type="BulkDataReport">
    <OUI>124BEB</OUI>
    <ProductClass>BGW</ProductClass>
    <SerialNumber>1234567890</SerialNumber>
    <Suspect>1</Suspect>
    <BulkData>
       <Name>InternetGatewayDevice.DeviceInfo.UpTime</Name>
       <Value>1449</Value>
     </BulkData>
     <BulkData>
       <Name>InternetGatewayDevice.ManagementServer.URL</Name>
       <Value>www.somesite.com</Value>
     </BulkData>
</ipdr:IPDR >
<ipdr:IPDRDoc.End count="1" endTime="2013-06-11T05:52:55.207Z"></ipdr:IPDRDoc.End>
</ipdr:IPDRDoc>
I am trying to get element values for BulkData

Here is the code I am using and having problem with:
Code:
$cpe = simplexml_load_file('test.xml');

$sxe=new SimpleXMLElement($cpe);
$sxe->registerXPathNamespace('ipdr','http://www.ipdr.org/namespaces/ipdr');

$result0=$sxe->xpath('ipdr:IPDR->BulkData[0]')->Value;
$result1=$sxe->xpath('ipdr:IPDR->BulkData[1]')->Value;

echo $result0 ' <br> ' $result1;
The result I am looking for should be :

1449
www.somesite.com

Thanks for any help you can offer.