Features gone in feature tree

I recently converted from Solidworks 2011 to Solidworks 2012.  I opened up a part I made and everything in the feature tree is deleted.  See attached picture.  It still has my part name and acts like the part still exists but everything is missing. This has happened to several of my parts.  I am pretty sure I modeled this part in the 2012 version.

SolidworksParts And Features