[R] Question about version argument of require() and library()

[James W. MacDonald]

As far as I know, the following should work. Can anybody tell me 
if/where I am going wrong?

 > packageDescription("KEGG", field="Version")
[1] "1.6.4"
 > require(KEGG, version="1.6.4")
Loading required package: KEGG
[1] FALSE
Warning message:
There is no package called 'KEGG', version 1.6.4 in: library(package, 
character.only = TRUE, logical = TRUE, warn.conflicts = warn.conflicts,

TIA,

Jim


-- 
James W. MacDonald
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109