problems with Mathematica fonts

Hi all
I am facing some dificulties in installing Mathematica fonts in=20
fptex-0.7. I follow the instructions that come together with the files
Acording to the instruction, all I have to do is to change texmf.cfg
as follows and the rehash it.
% Define the tree with the font pack
WRITREE=3D/usr/local/tex/MathematicaFontPack/texmf
%
% Add the new TDS root to the TEXMF variable
TEXMF =3D {$HOMETEXMF,!!$WRITREE,$TEXMFLOCAL,!!$TEXMFMAIN}

When I run latex I get the following metafont errors:
[3] (c:/TeX/texmf/tex/latex/wolfram/t1pjn.fd)This is METAFONT, Version=20
2.7182 (Web2c 7.3.7x)
mktexmf: empty or non-existent rootfile!
Transcript written on mfput.log.
kpathsea: Running mktexmf  pjnr8t
mktextfm: Could not map typeface abbreviation jn for pjnr8t.
mktextfm: Need to update c:/TeX/texmf/fontname/special.map?
mktextfm: Running mf "\mode:=3Dljfour; mag:=3D1; nonstopmode; input pjnr8=
t"
mktextfm: warning: can't open log file pjnr8t.log.
mktextfm: `mf "\mode:=3Dljfour; mag:=3D1; nonstopmode; input pjnr8t"' fai=
led.
! I can't find file `pjnr8t'.

Although the file t1pjn.fd contains the font pjnr8t. As I am not an font=20
expert, just a latex fan and enforcer, I am at lost here. Any help is=20
appreciated.
Nice Regards
--=20
Antonio Carlos Siqueira de Lima ([email protected])
Departamento de Eletrot=E9cnica
Universidade Federal do Rio de Janeiro
tel: 5521-25628036