Error: package/namespace load failed for ‘arm’

Hi!
I get the following error messages when trying to run the package 'arm'.

library(arm)

Error : Functions found when exporting methods from the namespace ?arm?
which are not S4 generic: ?fixef?, ?ranef?
Error: package/namespace load failed for ?arm?

My R version is:

version

                _
platform       i386-w64-mingw32
arch           i386
os             mingw32
system         i386, mingw32
status
major          2
minor          15.2
year           2012
month          10
day            26
svn rev        61015
language       R
version.string R version 2.15.2 (2012-10-26)
nickname       Trick or Treat

When running the install for 'arm' it looks like the install was successful
and 'arm' shows up in my package list and has created a folder in the
library (C:\Users\Pernille\Documents\R\win-library\2.15\arm)

install.packages("arm")

Installing package(s) into ?C:/Users/Pernille/Documents/R/win-library/2.15?
(as ?lib? is unspecified)
trying URL '
http://cran.rstudio.com/bin/windows/contrib/2.15/arm_1.6-01.02.zip'
Content type 'application/zip' length 237391 bytes (231 Kb)
opened URL
downloaded 231 Kb

package ?arm? successfully unpacked and MD5 sums checked

I have tried uninstalling and reinstalling 'arm'. I recently updated R from
version 2.15.0 to 2.15.2 but 'arm' ran with the same error messages in both
versions. It has never worked on my computer. I have tried in both 64 and
32 bit R.

Hope someone can help me, I much appreciate it!

Pernille Heelsberg

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