WMP11 Update playlists

I use WMP 9 on Xp workstation to keeep my playlists updated. When I copy the
..wpl playlist files from the XP pc to my laptop XP machine running WMP 11,
the songs within the .wpl playlists don't show the updates. For example, if
I add songs to test.wpl on WMP 9 and then copy the .wpl to the WMP 11 pc,
the test playlist on WMP 11 doesn't show the new songs.

To get the changes to show in WMP 11 Playlists, I have to drag and drop the
updated .wpl file to "Now Playling" navigation pane, and choose "save
playlist as" and then save it overwriting the older test.wpl.

Is there an easier way to keep two pcs wmp playlists syncronized?