Audiobooks Won't Synch to iPod

I am having a problem getting audiobooks to synch to my iPod. Generally I download audiobooks using Overdrive and sync then through iTunes to my iPod. I use the latest version of iTunes (11.3) and IOS 7.1 on the iPod. Now when I transfer a book in WMA format to the iPod, it shows up on the iPod but the title is greyed out and there is a grey circle to the left of the title. It appears that iTunes is not converting the files properly.



Now I have a new problem. I have an audiobook on CD which I ripped using iTunes. When I copied it over to the iPod, 2 of the 12 chapters were fine, but the other 10 were greyed out with the grey circle to the left of the title. All chapters of the book play OK in iTunes, but only 2 play on the iPod.



What is going on here?

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