[OSM-newbies] waypoints not showing up in Potlatch2

[Alexandros Papadopoulos]

Hi

I'm trying to upload to OSM a bunch of waypoints (POIs) I've captured
over the previous months. I use the method described here (part of
which I've edited as well, as this method used to work flawlessly for
me): http://wiki.openstreetmap.org/wiki/Upload_Waypoints

In short, I collect all my waypoint stanzas in one file, add some xml
headers, add a fake trackpoint and upload the GPX to OSM. Used to work
every time.

What happens now is that P2 comes up, but my POIs are nowhere to be
found. The red-circles-with-orange-inside that signified POIs of the
GPX file (as shown in
http://wiki.openstreetmap.org/wiki/Upload_Waypoints#Editing_in_Potlatch)
are gone.

The gpx in question is
http://www.openstreetmap.org/user/AlexandrosPapadopoulos/traces/1035752

and it starts with

<?xml version="1.0" encoding="UTF-8"?>
<gpx
  version="1.0"
  creator="GPSBabel - http://www.gpsbabel.org"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://www.topografix.com/GPX/1/0"
  xsi:schemaLocation="http://www.topografix.com/GPX/1/0
http://www.topografix.com/GPX/1/0/gpx.xsd">
<time>2011-06-18T20:16:17Z</time>
<bounds minlat="18.919172678" minlon="-94.799016668"
maxlat="53.523365306" maxlon="121.640266674"/>
<trk>
 <trkseg>
  <trkpt lat="40.862317253" lon="-74.412240721">
   <time>2009-06-21T15:34:01Z</time>
  </trkpt>
 </trkseg>
</trk>
<wpt lat="40.862317253" lon="-74.378809249">
  <ele>59.967407</ele>
  <name>165</name>
  <cmt>02-MAY-11 11:28:54</cmt>
  <desc>02-MAY-11 11:28:54</desc>
  <sym>Gas Station</sym>
</wpt>
...
(other <wpt> stanzas follow)
...

What am I doing wrong?

Thanks

Alex