problem-installing-glmmADMB-package

Hi, dear all.
neither
install.packages("glmmADMB", repos="http://R-Forge.R-project.org")
   nor
install.packages("R2admb")
install.packages("glmmADMB",
repos=c("http://glmmadmb.r-forge.r-project.org/repos",
                         getOption("repos")),
                 type="source")
,
helps me to intall this package;
my laptop is 64 bits, running under windows 8.1.
In advance, many thanks for any help.
Kind regards,
Amal