failed to install acts_as_ferret plugin

After enter in the command line :ruby script/plugin install
svn://projects.jkraemer.net/acts_as_ferret/trunk/plugin/acts_as_ferret
under WIndows XP , nothing happened. I wonder why? Thank you for your
help.

any help?

This happens when you dont have svn installed on your system as you
can see svn:// at the beginning of the uri which expects you to have
svn.

You can check this by just typing svn on your command line.

Grab it from here http://subversion.tigris.org/servlets/ProjectDocumentList?folderID=8100&expandFolder=8100&folderID=8100
then everything will work smoothly. Guess the correct version for you
is given at the bottom of the page , svn-win32-1.4.5.zip