Problem with PS generation

Hello,

I am trying using prosper for the first time. My latex file compiles 
perfectly fine, but the the ps file genrated gives an error saying some 
postscript specials could not be rendered. I searched through the archive, 
and seems like a few people have had this problem, but couldnt find any 
clear answers on what to do.

System details, the detailed gsview error message and the latex file are 
appended below.

any help is much much appreciated.

-Saurabh


Details: I am using Windows XP/WinEdt 5.4/Miktex 2.4/Ghostscript 8.51/GS 
view 4.7.

The gsview error message was:

GSview 4.7 2005-03-26
Unknown in Comments section at line 8:
  %%DocumentFonts: Times-Roman Helvetica CMSY10

Unknown in Prolog section at line 331:
  %%CreationDate: 1991 Aug 15 07:20:57

AFPL Ghostscript 8.51 (2005-04-18)
Copyright (C) 2005 artofcode LLC, Benicia, CA.  All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
Displaying DSC file C:/Documents and Settings/tavya/Desktop/Asl05/asl05.ps
Displaying page 1
Loading NimbusSanL-Regu font from C:\Program Files\gs\fonts/n019003l.pfb... 
2291320 945279 1838536 515631 2 done.
Loading NimbusRomNo9L-Regu font from C:\Program 
Files\gs\fonts/n021003l.pfb... 2388392 1076406 1858632 538941 2 done.
%GSVIEW_PDF_MARK: /DOCVIEW /PageMode /UseOutlines /View [/Fit] /Page 1
%GSVIEW_PDF_MARK: /PAGES /CropBox [0 0 595 890]
%GSVIEW_PDF_MARK: /PUT {Catalog} -dict-
Error: /undefined in H.S
Operand stack:

Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   
--nostringval--   2   %stopped_push   --nostringval--   --nostringval--   
false   1   %stopped_push   1   3   %oparray_pop   1   3   %oparray_pop   1  
  3   %oparray_pop   1   3   %oparray_pop   .runexec2   --nostringval--   
--nostringval--   --nostringval--   2   %stopped_push   --nostringval--
Dictionary stack:
   --dict:1129/1686(ro)(G)--   --dict:0/20(G)--   --dict:76/200(L)--   
--dict:179/300(L)--   --dict:17/200(L)--
Current allocation mode is local

--- Begin offending input ---
%%Page: 1 1
TeXDict begin 1 0 bop 0 TeXcolorgray -600 6000 a
SDict begin [ /Page 1 /View [ /Fit ] /PageMode /UseOutlines  /DOCVIEW
pdfmark end
-600
6000 a -600 6000 a
SDict begin [ /CropBox [0 0 595 890] /PAGES pdfmark end
-600 6000 a -600 6000 a
SDict begin [ {Catalog} << /ViewerPreferences<</FitWindow true/CenterWindow
true>>>> /PUT pdfmark end
-600 6000
a -600 6000 a
SDict begin H.S end
-600 6000 a -600 6000 a
SDict begin 12 H.A end
-600 6000 a -600
6000 a
SDict begin [ /View [/XYZ H.V] /Dest (Doc-Start) cvn H.B /DEST pdfmark
end
-600 6000 a 4500 6000 a
tx@Dict begin 90 Rot  end
4500 6000 a 4981 5222
a @beginspecial @setspecial
tx@Dict begin STP newpath 0.8 SLW 0  setgray  0. true -38.98012 -21.90872
340.57936 240.99477 .5 Frame  gsave false 1 0.0 0.0 gsave 0.88 0.95
1  setrgbcolor currentrgbcolor grestore gsave 1  setgray currentrgbcolor
grestore 300 0. 0. tx@GradientDict begin GradientFill end grestore
end

@endspecial @beginspecial
@setspecial
tx@Dict begin STP newpath 2.0 SLW 0  setgray  0.
--- End offending input ---
file offset = 20420
gsapi_run_string_continue returns -101

----------------------------------------------------

The latex file I am using
--------------------------------------------------------------------
\documentclass[pdf,distiller,fyma,slideBW,nocolorBG]{prosper}


\title{MIMO Channels}
\author{ST and Pv}

\begin{document}
\maketitle

\overlays{2}{
\begin{slide}{\underline{Problem Formulation}}
\begin{itemstep}
\item Positive definite distortion constraint:
\item What is the minimum sum-rate needed?
\end{itemstep}
\end{slide}
}

\end{document}
------------------------------------------------------------------------------------------




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