Non funziona piu` prosper

Salve a tutti.

Prima delle vacanze di Natale stavo facendo una presenzazione con prosper. Ero a buon punto e funzionava tutto. Tornato dalle vacanze, non funziona piu` niente. Anche scaricando l’esempio riportato sul sito GUIT, non funziona.
Ho sempre lo stesso errore:

`
This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6)
%&-line parsing enabled.
entering extended mode
(./prosper.tex
LaTeX2e <2005/12/01>
Babel and hyphenation patterns for english, usenglishmax, dumylang, noh
yphenation, arabic, farsi, croatian, ukrainian, russian, bulgarian, czech, slov
ak, danish, dutch, finnish, basque, french, german, ngerman, ibycus, greek, mon
ogreek, ancientgreek, hungarian, italian, latin, mongolian, norsk, icelandic, i
nterlingua, turkish, coptic, romanian, welsh, serbian, slovenian, estonian, esp
eranto, uppersorbian, indonesian, polish, portuguese, spanish, catalan, galicia
n, swedish, ukenglish, pinyin, loaded.
(/usr/share/texmf/tex/latex/prosper/prosper.cls
Document Class: prosper 2003/03/20, v. 1.6
(c) 2000-2003 Frederic Goualard, IRIN, France
and Peter M�ller Neergaard, Boston Univ., USA
CVSId: $Id: prosper.cls,v 1.25 2003/02/21 18:32:56 exupery Exp $
(/usr/share/texmf-texlive/tex/latex/graphics/graphicx.sty
(/usr/share/texmf-texlive/tex/latex/graphics/keyval.sty)
(/usr/share/texmf-texlive/tex/latex/graphics/graphics.sty
(/usr/share/texmf-texlive/tex/latex/graphics/trig.sty)
(/etc/texmf/tex/latex/config/graphics.cfg)
(/usr/share/texmf-texlive/tex/latex/pdftex-def/pdftex.def)))
(/usr/share/texmf-texlive/tex/latex/seminar/seminar.cls
Document Class: seminar 1997/10/13, 1.4
Document Style: `seminar' v1.4 <1997/10/13> (tvz)
(/usr/share/texmf-texlive/tex/latex/base/article.cls
Document Class: article 2005/09/16 v1.4f Standard LaTeX document class
(/usr/share/texmf-texlive/tex/latex/base/leqno.clo)
(/usr/share/texmf-texlive/tex/latex/base/size10.clo))
(/usr/share/texmf-texlive/tex/latex/seminar/sem-page.sty))
(/usr/share/texmf-texlive/tex/latex/seminar/semcolor.sty
Style Option: `semcolor' for doc style `seminar' 1.01 <2004/05/18> (tvz)
(/usr/share/texmf-texlive/tex/latex/pstricks/pstricks.sty
(/usr/share/texmf-texlive/tex/generic/pstricks/pstricks.tex
`PSTricks' v1.15 <2006/12/22> (tvz)
(/usr/share/texmf-texlive/tex/generic/pstricks/pstricks.con))
(/usr/share/texmf/tex/latex/xcolor/xcolor.sty
(/etc/texmf/tex/latex/config/color.cfg))))
(/usr/share/texmf-texlive/tex/latex/seminar/semlayer.sty)
(/usr/share/texmf-texlive/tex/latex/seminar/seminar.bug)
(/usr/share/texmf-texlive/tex/latex/seminar/seminar.bg2
seminar.bg2: various corrections for the Seminar document class
added since seminar.bug and few add-ons for overlays
(Version 2.1 of (D.G.))
) (/usr/share/texmf/tex/latex/prosper/seminar-bg2-lepennec.fix)
(/usr/share/texmf-texlive/tex/latex/hyperref/hyperref.sty
(/usr/share/texmf-texlive/tex/latex/hyperref/pd1enc.def)
(/etc/texmf/tex/latex/config/hyperref.cfg)
(/usr/share/texmf-texlive/tex/latex/oberdiek/kvoptions.sty)
Implicit mode ON; LaTeX internals redefined
(/usr/share/texmf-texlive/tex/latex/ltxmisc/url.sty))
*hyperref using driver hdvips*
(/usr/share/texmf-texlive/tex/latex/hyperref/hdvips.def
(/usr/share/texmf-texlive/tex/latex/hyperref/pdfmark.def))
(/usr/share/texmf/tex/latex/prosper/PPRfyma.sty
FYMA style for Prosper —
(copyleft) 2002, L. Jacques FYMA/UCL
CVSId: $Id: PPRfyma.sty,v 1.1 2003/01/27 14:39:20 exupery Exp $

(/usr/share/texmf-texlive/tex/latex/amsfonts/amssymb.sty
(/usr/share/texmf-texlive/tex/latex/amsfonts/amsfonts.sty))
(/usr/share/texmf-texlive/tex/latex/pst-grad/pst-grad.sty
(/usr/share/texmf-texlive/tex/generic/pst-grad/pst-grad.tex
(/usr/share/texmf-texlive/tex/latex/xkeyval/pst-xkey.tex
(/usr/share/texmf-texlive/tex/latex/xkeyval/xkeyval.sty
(/usr/share/texmf-texlive/tex/latex/xkeyval/xkeyval.tex)))
`pst-plot' v1.05, 2006/11/04 (tvz,dg,hv)))
(/usr/share/texmf-texlive/tex/latex/seminar/semhelv.sty
Style Option: `semhelv' for the `seminar' doc style 1.4 <2000/05/08> (tvz)
Modified by Stefan (see source for details)
))) (/usr/share/texmf-texlive/tex/latex/pstricks/pst-node.sty
(/usr/share/texmf-texlive/tex/generic/pstricks/pst-node.tex
v97 patch 11, 2000/11/09))
(/usr/share/texmf-texlive/tex/latex/moreverb/moreverb.sty
(/usr/share/texmf-texlive/tex/latex/tools/verbatim.sty))
(/usr/share/texmf-texlive/tex/latex/graphics/epsfig.sty)
(/usr/share/texmf-texlive/tex/latex/subfig/subfig.sty
(/usr/share/texmf-texlive/tex/latex/caption/caption.sty
(/usr/share/texmf-texlive/tex/latex/caption/caption3.sty)))
(/usr/share/texmf-texlive/tex/latex/ltxmisc/braket.sty) (./prosper.aux)
(/usr/share/texmf/tex/context/base/supp-pdf.tex
[Loading MPS to PDF converter (version 2006.09.02).]
) (/usr/share/texmf-texlive/tex/latex/hyperref/nameref.sty
(/usr/share/texmf-texlive/tex/latex/oberdiek/refcount.sty)) (./prosper.out)
(./prosper.out) (/usr/share/texmf/tex/latex/dblatex/misc/ragged2e.sty
(/usr/share/texmf-texlive/tex/latex/everysel/everysel.sty))
(/usr/share/texmf-texlive/tex/latex/psnfss/t1phv.fd)
(/usr/share/texmf-texlive/tex/latex/psnfss/t1ptm.fd)
(/usr/share/texmf-texlive/tex/latex/amsfonts/umsa.fd)
(/usr/share/texmf-texlive/tex/latex/amsfonts/umsb.fd)
! Undefined control sequence.
\c@lor@to@ps

l.19 \maketitle

? ! Undefined control sequence.
\XC@usec@lor …string \color@ #1#2\endcsname \@@
\fi \space
l.19 \maketitle

? ! Undefined control sequence.
\c@lor@to@ps

l.19 \maketitle

? ! Undefined control sequence.
\XC@usec@lor …\expandafter \c@lor@to@ps #1#2\@@
\else \expandafter \expand…
l.19 \maketitle

? ! Undefined control sequence.
\c@lor@to@ps

l.19 \maketitle

? ! Interruption.

1
l.19 \maketitle

? ! Undefined control sequence.
\XC@usec@lor …\expandafter \c@lor@to@ps #1#2\@@
\else \expandafter \expand…
l.19 \maketitle
…
…
…
`

Riporto un esempio della mia presentazione:

`
\documentclass[pdf,fyma]{prosper}
\hypersetup{pdfpagemode=FullScreen}
\usepackage{graphicx}
\usepackage{pstricks,pst-node,color}%,pst-text,pst-3d}
\usepackage{moreverb,epsfig,subfig,braket}
\newlength{\MiniPageLeft}
\newlength{\MiniPageRight}

\title{\bf{\red{EEEE}}}

\author{\bf{FFFF}}
\institution{\bf{AAAA}}
\date{\today}

\begin{document}
\maketitle

\begin{slide}{prova}
PROVA
\end{slide}
\end{document}
`

Spero qualcuno riesca ad aiutarmi con questo “mistero”.
Io utilizzo ubuntu 9.04. Grazie a tutti…