Pb encountered with demos

Hi all,


I've just installed R on my Mac & PC.
The base demo run fine.. But I'm encountering several pb with some packages
(installed using CRAN binaries using the menu)
- Lattice:

demo(lattice,package='lattice')

   demo(lattice)
   ---- ~~~~~~~
Type  <Return>     to start :

require(grid)

[1] TRUE

old.prompt <- grid.prompt(TRUE)
old.settings <- trellis.par.get()

Erreur dans eval.with.vis(expr, envir, enclos) :
   impossible de trouver la fonction "trellis.par.get"
- Zelig

demo(poisson,package='Zelig')

   demo(poisson)
   ---- ~~~~~~~
Type  <Return>     to start :

data(sanction)
user.prompt()

Erreur dans eval.with.vis(expr, envir, enclos) :
   impossible de trouver la fonction "user.prompt"
De plus : Warning message:
data set 'sanction' not found in: data(sanction)

Is there something wrong in the settings?
Thanks helping me to fix this

Naji

Mac
platform powerpc-apple-darwin7.9.0
arch     powerpc
os       darwin7.9.0
system   powerpc, darwin7.9.0
status
major    2
minor    2.0
year     2005
month    10
day      06
svn rev  35749
language R
PC
platform i386-pc-mingw32
arch     i386
os       mingw32
system   i386,mingw32
status
major    2
minor    2.0
year     2005
month    10
day      06
svn rev  35749
language R