Compute lip sync audio not creating vismes

hello all first time question asker

     i have built a puppet and rigged it accordingly.  now i recorded some audio at home and brought it to work as an mp3 file (which i have done in the past and it worked) and want to compute the lip sync from audio.  when i do this, no visemes show up.  now curiously enough if i use one of my older audio files from last month no problem, it works like a charm.  to my knowledge the file is not corrupted or anything.  ive gone through some of the other similar posts on here and tried all the solutions but nothing has worked.  

Attatched are the pictures of the rigging and the puppet showing now visemes in the audi lip sync bar.  if anyone has any clue as to why it would work for a previous file but not from a recent file please let me know this is driving me crazy