Lines removed from DWG file

I'm trying to save a drawing as DWG file, but everytime I goto save it deletes a portion of my drawing.
The drawings is of a plastic case with a handle (not a complicatedpart). The handle was created as a sweep feature and is not hidden.This is the only feature that is not showing up when saved. I canview it in my SW drawing, but as soon as I try to save it as a DWGor DXF, it removes it from both my saved CAD files as well as theSW drawing I am viewing. In the DWG files it removes it completely,but in the SW drawing file, it is just not visible. I can stillselect it with my mouse, but I cannot see it or "unhide" it. If Itoggle between my view with hidden line and HLR it reappears.
Anyone else have this problem? Any suggestions on how to fix it?
I thought it might be a graphics problem, but I don't understandwhy it only dissappears when I save. Never seen SW do this before.
Using NVIDIA GeForce FX 5200 graphics card.

Update: OK, I figured out what was wrong, but not why it was wrong.All the views that wouldn't show up were projected. I changed themall to original front, top, side, etc. views and had no problems. Idon't think I should have had to do that, but at least itworks.SolidworksDrawings And Detailing