Audiobooks Will Not Transfer To iPhone

[HKverfechter]

I have a rather robust library of audiobooks that I had downloaded from Audible. I am able to transfer these books (entire library) onto my iPod. I just purchased an iPhone and noted that I am only able to transfer AAC files to my iPhone. The files that do not transfer are; 4 (MP3), per Format: in Summary, of the "Get Info" tab Shouldn't I be able to listen to these? I tried going to; Advanced>in iTunes>Create AAC Version, but get an error message.
Any ideas?

 

[macsimo]

Try this: Highlight you Audiobook, click on File-Get Info and then click on the
Options Tab. You will see where it asks you Media Kind. Change it to Audiobook. That should covert the file and it will be moved into Audiobooks.
Hope it works for you.