get xml data into html

Here is my xml data that i created using FFPROBE

<ffprobe>
<format filename="capturedvideo_1.MOV" nb_streams="2" nb_programs="0"        format_name="mov,mp4,m4a,3gp,3g2,mj2" format_long_name="QuickTime / MOV" start_time="0.000000" duration="5.294150" size="531762" bit_rate="803546" probe_score="100">
<tag key="major_brand" value="qt "/>
<tag key="minor_version" value="0"/>
<tag key="compatible_brands" value="qt "/>
<tag key="creation_time" value="2015-02-17 20:58:18"/>
<tag key="model" value="iPod touch"/>
<tag key="model-eng" value="iPod touch"/>
<tag key="encoder" value="6.1.6"/>
<tag key="encoder-eng" value="6.1.6"/>
<tag key="date" value="2015-02-17T15:58:18-0500"/>
<tag key="date-eng" value="2015-02-17T15:58:18-0500"/>
<tag key="make" value="Apple"/>
<tag key="make-eng" value="Apple"/>
</format>
</ffprobe>

And here is the script that i am writing to try to extract the data into my html page

<%
Dim xmlobj 
Set xmlobj = server.CreateObject("Microsoft.XMLDOM")
xmlobj.async = false
xmlobj.setProperty "ServerHTTPRequest", True 
  xmlobj.load("http://ift.tt/1Myg04H")

%>

<%

Response.Write "<h2>Video Duration</h2>"


Set parentnode = xmlobj.getelementsbytagname("format/format_long_name")
Response.Write "<h1>"
for i = 0 to parentnode.length-1
Set parentnodeObj = parentnode.item(i) 
for j = 0 to parentnodeObj.childNodes.length-1
childdata = parentnodeObj.childNodes(j).text
Response.Write childdata&" "
next
Response.Write "</h1>"
next


%>

However the data is not being displayed

I am trying to put the DURATION time into my HTML information. This really is the only data that i need.

Can anyone tell me what i am doing wrong?