HTS-5.2-16 doesn't recognize USB ports of the system.

HTS-5.2-20 fixed the above problems. But RedHat said HTS-5.2-20 is not an
official version. So they didn't accept the test results that I submitted, and
tell I have to use HTS-5.2-16.

lspci shows there are USB ports:

[root@chevy01 hts]# lspci
00:02.0 PCI bridge: IBM EADS-X PCI-X to PCI-X Bridge (rev 03)
00:02.4 PCI bridge: IBM EADS-X PCI-X to PCI-X Bridge (rev 03)
c0:01.0 RAID bus controller: IBM Obsidian chipset SCSI controller (rev 01)
d0:01.0 USB Controller: NEC Corporation USB (rev 43)
d0:01.1 USB Controller: NEC Corporation USB (rev 43)
d0:01.2 USB Controller: NEC Corporation USB 2.0 (rev 04)
0001:01:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
Controller (rev 06)
0001:01:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
Controller (rev 06)
[root@chevy01 hts]#

"hts print " shows no USB:

and contents of config.xml and plan.xml:

[root@chevy01 hts]# hts print

Test Plan:
----------------------------------------------------------------
cdrom      scd0
network    eth1
network    eth0
memory
core
storage    sda
storage    sdb
storage    sdc
info
-----------
[root@chevy01 hts]# cat config.xml
<?xml version='1.0' encoding='UTF-8'?>
<certification-test discover-time='2008-10-18 00:07:58' hts-release='16'
hts-version='5.2'>
  <hardware>
    <arch>ppc64</arch>
    <model>Power 570 Server (9117-MMA)</model>
    <vendor>IBM</vendor>
    <make/>
  </hardware>
  <certification>
    <os>
      <name>Nahant Update 5</name>
      <release>4</release>
    </os>
  </certification>
</certification-test>
-----------
[root@chevy01 hts]# cat plan.xml
<?xml version='1.0' encoding='UTF-8'?>
<certification-test discover-time='2008-10-18 00:07:58' plan-time='2008-10-18
00:07:59' hts-release='16' hts-version='5.2'>
  <hardware>
    <arch>ppc64</arch>
    <model>Power 570 Server (9117-MMA)</model>
    <vendor>IBM</vendor>
    <make/>
  </hardware>
  <certification>
    <os>
      <name>Nahant Update 5</name>
      <release>4</release>
    </os>
  </certification>
  <test name='cdrom' label='' logical-device='scd0' device-class='CDROM'
device-bus='SCSI' udi='' interactive='yes'/>
  <test name='network' label='' logical-device='eth1' device-class='NETWORK'
device-bus='PCI' udi='' interactive='no'/>
  <test name='network' label='' logical-device='eth0' device-class='NETWORK'
device-bus='PCI' udi='' interactive='no'/>
  <test name='memory' label='' logical-device='' device-class='MEMORY'
device-bus='' udi='' interactive='no'/>
  <test name='core' label='' logical-device='' device-class='CPU' device-bus=''
udi='' interactive='no'/>
  <test name='storage' label='' logical-device='sda' device-class='STORAGE'
device-bus='SCSI' udi='' interactive='no'/>
  <test name='storage' label='' logical-device='sdb' device-class='STORAGE'
device-bus='SCSI' udi='' interactive='no'/>
  <test name='storage' label='' logical-device='sdc' device-class='STORAGE'
device-bus='SCSI' udi='' interactive='no'/>
  <test name='info' label='' logical-device='' device-class='ALL' device-bus=''
udi='' interactive='no'/>
</certification-test>
----------------