DISAPPEARING PARTS IN SECTION VIEWS

I HAVE A PROBLEM WITH SOME PARTS MISSING FROM MY SECTION VIEWS. I WENT THROUGH THE FORUMS TO LOOK FOR AN ANSWER AND FOUND A FEW POSTS, BUT NOTHING TO FIX MY PROBLEM. I HAVE NOTHING HIDDEN IN THE SECTION SCOPE, ALL PARTS ARE SOLID PARTS NOT SURFACES, AND NOTHING IS HIDDEN IN THE FEATURE MANAGER. I HAVE ONLY ONE DISPLAY STATE FOR THE ONLY CONFIGURATION.

I AM USING SW2011 SP2.0 ON WIN7 MACHINE WITH 12 GIG RAM AND AN APPROVED CARD.

SolidworksGeneral