XML won't parse on a machine

I am a CRM developer, and have vbscript code that runs in SalesLogix forms, and it is calling a GEOCODE service at serviceobjects.com.  I developed it fine on one machine yesterday, and it works beautifully for address validation.  Then went to deploy on another machine today, and it will not return the results.  I have checked everything.  Both machines have MSXML4 SP2.  The original machine still works, but this one does not.  It also does not return me an error or anything, just empty results.  

I know it is a client-side issue, because if I run the script and do a message box.... press CTRL + C... copy the URL into a browser, I get the result that I need:
  <?xml version="1.0" encoding="utf-8" ?>
- <Location xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.serviceobjects.com/">
  <Latitude>34.433973</Latitude>
  <Longitude>-119.683891</Longitude>
  <Zip>93103-2112</Zip>
  <Tract>0006.00</Tract>
  <Block>5000</Block>
  <Level>S</Level>
  <LevelDescription>The address matched exactly at the street location.</LevelDescription>
  </Location>

Thanks in advance for any advice on what to check on the clients.