Itunes U won't sync to my ipod nano

Question

I downloaded various itunes U podcasts. I selected them to be included on my nano, however they won't transfer over. I tried selecting only some, all, all unplayed, etc. No matter what I choose they won't show up on my Nano. This is particularly odd because I had earlier podcasts from one of these on my Nano previously without issue.

Answer 1

Well I finally solved it on my own.  here's what I did:
With my Nano connected I turned on the sidebar in iTunes so it shows you your iPOD connected.
I then clicked on "Jeff's Nano" within the iTunes sidebar, and in the middle of the iTunes screen found the menu that allows you to  select "manually manage music and videos", deleted a couple of songs from my library to make sure it was not too much for my NANo, running low on disk space.
I then tried to re-sync.  Again it synched but no song downloaded to Jeff's Nano.
So I de-selected the options menu selection back to automatically synch with the iPOD (removed checkbox next to manually control...), and when I did that iTunes said something like this:
" The Ipad -NAME- is synced with annother itunes library. Do you want to erase this Ipad and sync with this itunes library?"
Strange since I only have one library, my current one.
So I said yes, let it erase and sync with it.  It took about 30 minutes for it re-write over 3770 songs to my nano, but this time, it did copy finally my purchased song along with a couple of other MP#s that were not making it onto my Nano.
the key in my case, was allowing the Nano to erase, and resync and reload the full library.  We'll see going forward if I'm able to continuously add songs again.