This should only occur if you are using version 3.1.4 or OLDER
Download the latest version of Pocket Tunes 4 from here.
Download the latest version of Pocket Tunes 3 here.
And install it to your desktop and Palm as per the instructions in the User Guide (Pocket Tunes 3 user guide is here)
IMPORTANT: Delete any of the tracks that had previously been transferred to your device.
Then re-transfer them again, making sure you follow the transfer instructions in this Knowledge Base article or the User Guide