Vista - "Missing Object" when modifying XML

I am having a heck of a time figuring out how to simply add one
element in an XML file.

<?xml version="1.0" encoding="utf-8"?>
<ScanControl>
<TargetInfo>
<WindowsScan enabled="true"/>
<OptionSet name="default">
<WBEM enabled="true"/>
<SNMP enabled="true"/>
</OptionSet>
<IPScan enabled="true">
<IPRange start="192.168.67.2" end="192.168.67.254"
credentials="Default" options="Default"/>
</IPScan>
</TargetInfo>
</ScanControl>

I'd like to script adding additional <IPRange> elements. I found the
following helpful posts in this newsgroup:

http://preview.tinyurl.com/4kckst
http://preview.tinyurl.com/3u9bl7

and this MSDN page: http://msdn.microsoft.com/en-us/libr...81(VS.85).aspx.

So I'm trying to adapt Anthony Jones's AddElem functions to my
situation. I keep getting this frustrating "missing object" error
when I run the script. I broke everything down to where I had a
simple script that just created a dom, loaded the XML file, and then
Wscript.Echo'd the dom.documentElement, and yet still it said "missing
object: dom.documentElement". Very frustrating, yes. You'd think the
thing would know what the documentElement is. But also a happy
moment, because it means I've isolated the problem.

Turns out I was using .loadXML when what I wanted was the .load
method. Thank you all for listening.

-todd