Since myPod needs to know about your mp3 clips for almost any action, its probably a good idea to make some of them known to it. Here is how to do that...
Go to the file menu and select “Scan Disc for Media ...”
Select files and / or directories to be scanned recursively for mp3 files.
After myPod finished reading the meta data from the files, select the “all my music” playlist and refresh its content by pressing the F5 key Now the playlist should contain some new clips which are shown in the table of clips.