I'm having problems hatching (hatch and/or fill) of an isometric drawing.

Some faces fill/hatch ok, others do not.

This is more than likely associated with isocircles, as there are a few used in this dwg. 

The dwg I did in isometric that had 'square' angles, hatched/filled w/o any problems.

ETA: co-worker was able to hatch sections I wasn't able to, he is using AutoCAD 2011.