[R] R version conflict.

[Bai Yan]

Download R-1.6.2 source code package from http://cran.r-project.org and
compiled successfully.
When run library(grid), get error message as the R version is 1.5.1, and
cannot support grid package. The weird thing is that R.Version() returned
as this R is actualy 1.5.1

Did anybody get the same problem? or I made something wrong? Thanks.

----------------------------------------
> library(grid)
Error: This is R 1.5.1, package grid needs >= 1.6.0
> R.Version()
$platform
[1] "i686-pc-linux-gnu"

$arch
[1] "i686"

$os
[1] "linux-gnu"

$system
[1] "i686, linux-gnu"

$status
[1] ""

$major
[1] "1"

$minor
[1] "5.1"

$year
[1] "2002"

$month
[1] "06"

$day
[1] "17"

$language
[1] "R"