Removing directory?

Hi,

I'm trying to remove/delete a directory usingR.  I've tried the
following with no success:

% Rterm --vanilla

getwd()

[1] "C:/Documents and Settings/hb/braju.com.R/aroma.affymetrix/test"

dir.create("foo")
file.info("foo")

    size isdir mode               mtime               ctime               atime
foo    0  TRUE  777 2007-02-28 14:52:10 2007-02-28 14:52:10 2007-02-28 14:52:10

# Using file.remove()

res <- sapply(c("foo", "foo/", "foo\\", "./foo", "./foo/"), file.remove)
res

   foo   foo/  foo\\  ./foo ./foo/
 FALSE  FALSE  FALSE  FALSE  FALSE

# Using unlink()

res <- sapply(c("foo", "foo/", "foo\\", "./foo", "./foo/"), unlink)
res

   foo   foo/  foo\\  ./foo ./foo/
     1      0      0      1      0

# Directory is still there

file.info("foo")

    size isdir mode               mtime               ctime               atime
foo    0  TRUE  777 2007-02-28 14:52:10 2007-02-28 14:52:10 2007-02-28 14:52:10

I've tried the above from a different directory too, i.e.
setwd("C:/"), with no success.  Using absolute pathnames the same.

This is on WinXP R v2.4.1:

sessionInfo()

R version 2.4.1 Patched (2007-01-13 r40470)
i386-pc-mingw32

locale:
LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MON
ETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252


attached base packages:
[1] "stats"     "graphics"  "grDevices" "utils"     "datasets"  "methods"
[7] "base"

Thanks

Henrik