Working with Maxima from inside Lyx broken?

[Maarten]

Hello list,

On my office linux box I have lyx working nicely with maxima. I installed
Maxima and Lyx on my home Freebsd box but there it does not work...
In the shell from which I start Lyx I see:

$ lyx
use equation inset
use cell: [char i mathalpha][char n mathalpha][char t mathalpha][char e
mathalpha][char g mathalpha][char r mathalpha][char a mathalpha][char t
mathalpha][char e mathalpha][delim ( ) [frac [char x mathalpha] [char 1
mathalpha][char + mathalpha][sup [char x mathalpha] [char 3
mathalpha]]][char + mathalpha][char 1 mathalpha][char , mathalpha][char x
mathalpha]]
checking expr: 'integrate(( x )/(1 +  x ^(3)) + 1,x)'
calling: echo 'SIMPSUM:true;tex(integrate(( x )/(1 +  x ^(3)) + 1,x));' |
maxima

In the document only an = appears after te equation.

When I do the echo part manually (in a terminal) I get:

$ echo 'SIMPSUM:true;tex(integrate(( x )/(1 +  x ^(3)) + 1,x));' | maxima
GCL (GNU Common Lisp)  2.6.5 CLtL1    Feb  4 2005 18:22:30
Source License: LGPL(gcl,gmp), GPL(unexec,bfd)
Binary License:  GPL due to GPL'ed components: (READLINE UNEXEC)
Modifications of this banner must retain notice of a compatible license
Dedicated to the memory of W. Schelter

Use (help) to get some basic information on how to use GCL.

Error: Cannot open the file .
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by LISP:IF.
Broken at LOAD.  Type :H for Help.
MAXIMA>>
Error: There is no package with the name SIMPSUM.
Fast links are on: do (si::use-fast-links nil) for debugging
Error signalled by LOAD.
Backtrace: SYSTEM:UNIVERSAL-ERROR-HANDLER

Broken at LOAD.
MAXIMA>>$


Does anyone have an idea on where to start looking for the solution to get
at least the example at http://maxima.sourceforge.net/lyx+maxima.lyx
working?

Thanks,

Maarten
FreeBSD maarten.lan 5.3-RELEASE FreeBSD 5.3-RELEASE #0: Fri Nov  5
04:19:18 UTC 2004    
root at harlow.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386