[R] install vegan

[Carolin]

Dear all,

I am trying to install Vegan, but I allways get the following error
message:

Warning in install.packages(choose.files("", filters =
Filters[c("zip",  :
  'lib = "C:/Programme/R/R-2.12.0/library"' is not writable
Error in install.packages(choose.files("", filters =
Filters[c("zip",  :
  unable to install packages
> utils:::menuInstallLocal()

does anybody know what is wrong?

Thanks in advance,
Carolin