Including PS/Latex graphics

Hello,

Can somebody tell me how to include combined PS/Latex graphics in a 
Prosper presentation? I'm trying to compile the following test document:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\documentclass[%
  pdf,
  colorBG,
  final,
  total,
  slideColor,
]{prosper}

\usepackage{graphicx}
\usepackage{epsfig}

\include{hdr_macros}

\title{the title}
\author{the author}
\slideCaption{the slide caption}

\begin{document}
\maketitle

\begin{slide}{the first slide}
\scalebox{1}{\input{treillis2.pstex_t}}
\end{slide}

\end{document}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

This gives me the following error:
[1] (./treillis2.pstex_t <treillis2.pstex>
! Undefined control sequence.
<argument> ... }{\mddefault }{\updefault }{\color
                                                  [rgb]{0,0,0}$m_1$}}
l.14 }}}}


If I try to add the package color (\usepackage{graphicx, color}, the 
error becomes:

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                             
                                                 
l.159   \definecolor{black}{gray}{0}


The errors go away if I remove the special flags in the xfig figure. 
Problem is, I really need them.
This is my first time using Prosper, and it's kind of hard to find 
what's going wrong. Can somebody help?

Thanks,
Florence







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