Restored ipod, but won't update original music

Question

i restored my ipod, and while i was doing that i downloaded some more music. when i clicked on 'update my ipod', it proceeded to add the new music i had just downloaded, but ignored all of my other music.
when i go to my ipod to see the list of songs, it shows ALL of them, both old and new stuff, but won't play any of the old stuff.
what have i done wrong and how can i correct it?

Answer 1

This may just depend on your preferences.
You should try just going to Edit>Preferences>iPod tab, then see if it says "Automatically update all songs and playlists", or "Manually manage songs and playlists" or the third, less used, option: "Automatically update selected playlists only".
If under the preferences you find that it's on one of the automatic ones, you might want to change it to Manually manage songs and playlists then try dragging your whole library from the library (to select all of them click on one song then hold down the Ctrl+A button) to the picture of the iPod on the left (under the source list, where it shows Library, Podcasts, etc.).