Problem getting a2ps to print duplex correctly

[Dyche, Hubert C]

           a2ps 4.13  Linux
           The default medium is Letter.  And using landscape setting.
           Using -MLetter  and Duplex printing to a HP LaserJet 5 Si MX the
following occurs:
           
The odd number pages print correctly, however the even number pages have the
header an inch down from the top of the page and the border, and footers and
lines
of text are lost.  Here is the command I'm using

           a2ps -r --columns=1 --rows=1 --chars-per-line=131 --borders=yes
-MLetter file_name.txt

           Any suggestions on how to fix this would be appreciated.

           I was able to get -MExecutive to fit but it doesn't fill enough
of the page to be of use as the
           documents we are printing are hundreds of pages.


           Thanks,
            Hugh Dyche
            Software Engineer - Lockheed Martin Corporation.