duplex printing problem (ps file)

[kazdan]

Using cups 1.1.19 I am attempting to print a postscript file duplex
"tumble" (flipping the page on the short side) -- but it does not
work.

Although the printer is configured correctly (see output below from
    lpoptions -p DuplexLandscape -l)
when I attempt to print using _either_ of the commands:
    math:~> lpr -P DuplexLandscape print.ps
    math:~> lpr -P DuplexLandscape  -o sides=two-sided-short-edge print.ps
it prints on only one side of the page.

Note, however, that if I convert the postscript file to pdf (using
ps2pdf), then the page prints duplex correctly with the SAME command:
    math:~> lpr -P DuplexLandscape print.pdf
Also, if I print a simple text file duplex "tumble" it prints correctly.

In case it helps, below are more details on my operating system,
version of cups, "lpoptions -l" output as well as the first 40 lines of
the postscript file -- since I suspect that may be where the problem is.

     Any suggestions?
     	Jerry

                      ====================

Linux Mandrake 9.2  (kernel: 2.4.22-10md)
                      ====================

cups installation from the following Mandrake 9.2 rpms:
        cups-1.1.19-10mdk.i586.rpm
        cups-common-1.1.19-10mdk.i586.rpm
                      ====================
math:~> lpoptions -p DuplexLandscape -l
HPEconoMode/EconoMode: *PrinterDefault True False
HPHalftone/Levels of Gray: *PrinterDefault Enhanced Standard
Resolution/Printer Resolution: 1200x1200dpi 600x600x2dpi *600x600dpi 300x300dpi
Smoothing/Resolution Enhancement: PrinterDefault *On Off
Duplex/2-Sided Printing: None DuplexNoTumble *DuplexTumble
PageSize/Media Size: Letter LetterSmall Executive Legal LegalSmall *A4 A4Small A5 A6 ISOB5 B5 w612h936 Postcard DoublePostcard w558h774 Env10 EnvMonarch EnvDL EnvC5 EnvISOB5 Custom
InputSlot/Media Source: Upper Middle Lower Auto
PageRegion/PageRegion: Letter LetterSmall Executive Legal LegalSmall A4 A4Small A5 A6 ISOB5 B5 w612h936 Postcard DoublePostcard w558h774 Env10 EnvMonarch EnvDL EnvC5 EnvISOB5
ManualFeed/Tray 1 (Manual): True *False
HPOption_Duplexer/Duplex Unit: *True False
HPOption_PaperPolicy/Fit to Page: *PromptUser NearestSizeAdjust NearestSizeNoAdjust
InstalledMemory/Total Printer Memory: *8MB 16MB 24MB 32MB 48MB 64MB
HPOption_Tray3/Tray 3: *True False

-----------------------------------------------------------------------
These are the first 40 lines of my postscript file "print.ps"
                      ====================
%!PS-Adobe-2.0
%%Creator: dvips(k) 5.92b Copyright 2002 Radical Eye Software
%%Title: japan.dvi
%%Pages: 2 0
%%PageOrder: Ascend
%%BoundingBox: 0 0 596 842
%%DocumentFonts: EURB10 CMR10 CMR12 CMSY10 CMTI12 CMCSC10 CMR8 CMR7
%%+ CMMI12 CMMI8 CMSY8 MSBM10 CMR6 CMMI6 CMBX12 CMSL12 CMEX10 MSAM10
%%+ CMMI10 CMSY7 CMSY6 CMMI7 CMSY5 MSBM7 CMTI10 CMBX10
%%EndComments
%%BeginProcSet: PStoPS 1 15
userdict begin
[/showpage/erasepage/copypage]{dup where{pop dup load
 type/operatortype eq{1 array cvx dup 0 3 index cvx put
 bind def}{pop}ifelse}{pop}ifelse}forall
[/letter/legal/executivepage/a4/a4small/b5/com10envelope
 /monarchenvelope/c5envelope/dlenvelope/lettersmall/note
 /folio/quarto/a5]{dup where{dup wcheck{exch{}put}
 {pop{}def}ifelse}{pop}ifelse}forall
/setpagedevice {pop}bind 1 index where{dup wcheck{3 1 roll put}
 {pop def}ifelse}{def}ifelse
/PStoPSmatrix matrix currentmatrix def
/PStoPSxform matrix def/PStoPSclip{clippath}def
/defaultmatrix{PStoPSmatrix exch PStoPSxform exch concatmatrix}bind def
/initmatrix{matrix defaultmatrix setmatrix}bind def
/initclip[{matrix currentmatrix PStoPSmatrix setmatrix
 [{currentpoint}stopped{$error/newerror false put{newpath}}
 {/newpath cvx 3 1 roll/moveto cvx 4 array astore cvx}ifelse]
 {[/newpath cvx{/moveto cvx}{/lineto cvx}
 {/curveto cvx}{/closepath cvx}pathforall]cvx exch pop}
 stopped{$error/errorname get/invalidaccess eq{cleartomark
 $error/newerror false put cvx exec}{stop}ifelse}if}bind aload pop
 /initclip dup load dup type dup/operatortype eq{pop exch pop}
 {dup/arraytype eq exch/packedarraytype eq or
  {dup xcheck{exch pop aload pop}{pop cvx}ifelse}
  {pop cvx}ifelse}ifelse
 {newpath PStoPSclip clip newpath exec setmatrix} bind aload pop]cvx def
/initgraphics{initmatrix newpath initclip 1 setlinewidth
 0 setlinecap 0 setlinejoin []0 setdash 0 setgray
 10 setmiterlimit}bind def
end
%%EndProcSet
%DVIPSWebPage: (www.radicaleye.com)
%DVIPSCommandLine: dvips japan -o
%DVIPSParameters: dpi=600, compressed
%DVIPSSource:  TeX output 2004.05.22:1134
%%BeginProcSet: texc.pro
..snip>...