akima error

I am trying to load the GRASS library and am getting the following 
error:

 > library(GRASS)
Loading required package: akima
Error: package 'akima' could not be loaded
In addition: Warning message:
There is no package called 'akima' in: library(pkg, character.only = 
TRUE, logical = TRUE, lib.loc = lib.loc)

This is on R 2.0.0, library(GRASS) is installed, and update.packages() 
has been run.

Thanks

Kirk R. Wythers	
Dept. of Forest Resources
University of Minnesota
email: kwythers@umn.edu
tel: 612.625.2261
fax: 612.625.5212