Cannot see files on Fuze

I use Windows Vista service pack 1, Fuze firmware version v01.01.15a with Media player version 11.0.6001.7004.  I have been adding 2 different podcasts for several months with no problems.  However, now only 1 of them shows up on the fuze when I disconnect it.  While connected the files are there.  When I disconnect they are not.  The other podcast is behaving normally.  They are both mp3 type files.  I have tried 3 different computers with the same results.  Any ideas

Why don’t you start off by updating the firmware on your Fuze?

I will try that