[bdbxml] Query multiple element's subelement?

Hi all...

I have a XML document stored in dbxml that looks like:

<?xml version="1.0" standalone="no" ?>
<manifest>
  <metadata>
    <schema>ADL SCORM</schema>
    <schemaversion>1.2</schemaversion>
    <lom xmlns="http://www.imsglobal.org/xsd/imsmd_rootv1p2p1"; >
      <general>
        <title>
          <langstring xml:lang="en-US">Academic ADL Co-Lab</langstring>
        </title>
        <description>
          <langstring xml:lang="en-US">A description</langstring>
        </description>
        <keyword>
          <langstring xml:lang="en-US">SCORM</langstring>
        </keyword>
        <keyword>
          <langstring xml:lang="en-US">SCORM2</langstring>
        </keyword>
      </general>
Etc.

I am attempting to search the langstring value under keyword, but I
can't seem to get results for 'SCORM2'. My query looks like: 

contains(/xmlns:lom/xmlns:general/xmlns:keyword/xmlns:langstring/text(),
'SCORM2'). 

I never get results for any keyword but the first one (i.e. in the
example above, I would have to search for SCORM to get a result). If I
do: 

contains(/xmlns:lom/xmlns:general/xmlns:keyword[position()=2]/xmlns:lang
string/text(), 'SCORM2')

Then I would get results.

Any ideas?
Thanks,
John