You connect your Windows Mobile 5.0 Pocket PC/Smartphone to Activesync 4.2 with a memory/storage card inserted. Activesync will connect and synchronize successfully but Windows Media Player 10 on your desktop will not recognize the memory/storage card inserted in the device.

To resolve this issue, you can try two things:

1) Check for free space on the storage card. There should be quite some free space left for the DRM/ license details to be written to the MSMETADATA folder
2) Use the File Explorer and delete a Hidden folder called MSMETADATA and try to sync again