AutoCAD 2010 :: Linetypes - Line With Small Squares Shown

If I start autocad and draw a line then change its linetype from continuous to Fenceline2 it shows up like it's supposed to, a line with small squares in it.   I can also change it's linetype to Fenceline1 and the linetype shows up just fine with the line and small circles in it.

But when I call up some existing autocad drawings that have lines with the Fenceline1 or Fenceline2 linetypes assigned to them, the small boxes or circles are missing from the linetypes.  When you type linetype at the command prompt the linetypes are listed in the dialog box, but for some reason they are not showing up right in the existing drawing.     When I type linetype, and hit the load button, and browse to my acad.lin file and select it, I get an error message of Bad Definition for linetype Fenceline1 and another for Fenceline2 and another for Batting etc.

So why are these Complex linetypes not working in the Existing drawing but work fine in the just call up autocad empty drawing, and how do I fix them to work in the existing drawing?