package ‘raster’ is not available (for R version 2.14.1)

We are trying to install raster on a computer
running ubuntu Precise and get

install.packages("raster",repos="http://R-Forge.R-project.org")

Warning in install.packages :
  package ?raster? is not available (for R version 2.14.1)
Installing package(s) into ?/home/ina/R/x86_64-pc-linux-gnu-library/2.14?
(as ?lib? is unspecified)
Warning in install.packages :
  package ?raster? is not available (for R version 2.14.1)

We have also tried with the CRAN repo, same result.

Any other way we could install the raster package?

Thanks

Agus