Figure disappears in Aux viewport in bottom view

Hi, I am fairly new and have G8F open in viewport with texture shaded and in interactive mode. I have the aux viewport in nividia iray selected... The problem is when I rotate (orbit) the figure to any bottom view in the main viewport it disappears in the aux viewport and will not render? What am I doing wrong? Thanks
Comments
In the Render Settings pane, turn Draw Ground off.