My Sansa Connect Does Not Load All Music Files

I Finally got my Win. Vista to work with my Sansa Connect but the Yahoo Music program has over 250 songs but my Connect only picked up 192. Why does it not sync all music when I perform " sync all music ".

Another question how do I add Photos to the Connect?

Some of your songs may be in formats that are not supported by the Connect.  See the user’s guide for these formats, as well as information on how to load photos onto your Connect.