[R-sig-hpc] Error message "not installed for 'arch=xx'" when installing Rmpi in R-2.12.0

[Melwin]

Dear all,
I tried to install Rmpi 0.5.9 (MPICH-version) for R-2.12.0 under Windows  
7, 64bit.
In both R-variants (32/64 bit) I get the following error message:

R 32 bit:
> install.packages(pkgs="e:/download/Rmpi_0.5-9.zip", repos = NULL, type =  
> "win.binary")
> library(Rmpi)
Error: package 'Rmpi' is not installed for 'arch=i386'

R 64 bit:
> install.packages(pkgs="e:/download/Rmpi_0.5-9.zip", repos = NULL, type =  
> "win64.binary")
> library(Rmpi)
Error: package 'Rmpi' is not installed for 'arch=x64'

There are no other R-versions on this computer.
I tried both versions of MPICH (32 and 64 bit) - same results.
I tried installing both R and MPICH in 32 bit only - same results.

Thanks in advance for any advice.

Melwin


sessionInfo()
R version 2.12.0 (2010-10-15)
Platform: i386-pc-mingw32/i386 (32-bit)

locale:
[1] LC_COLLATE=German_Germany.1252  LC_CTYPE=German_Germany.1252
[3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C
[5] LC_TIME=German_Germany.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

loaded via a namespace (and not attached):
[1] tools_2.12.0