Not sure if this will help, but thought I'd share what I found:
Windows Vista Update for Windows Media Player 11 and Windows Mobile 5
Found in:Mobile News, updates, Multimedia, WM5,
In case you are a Windows Mobile 5 user on desktop Windows Vista, you may have experienced problems wile trying to set up your storage card on the device to synchronize with Windows Media Player 11. Microsoft has issued an update (via Windows Update) to address the issue, so check it out and don’t miss the chance to dissolve such future bugs.
Now, with the fix Microsoft describes in the Knowledge Base article 931621 and which is distributed via Windows Update now, Microsoft solves this problem.
