AutoCAD 2004/2005/2006 DWG Format

[#1]

Hi,

Can anyone point me in the right direction on enclosing this area to be hatched?  I've tried chamfering the corners to 0, extending & trimming & redrawing the lines & it still is not selecting an internal point.  I don't know if I've got a hatch problem or a drawing problem.  Thanks in advance. 

This CAD file was created in AutoCad LT 2006 but have the same issue when I open it in 2010 Mechanical. 

[#2]

They are not on the same plane, use FLATTEN command to flatten them to zero and try again.

[#3]

Thanks!  We couldn't use FLATTEN but at least we can move forward.