unable to add the flash player helper

hi

i am trying to add the flash player helper on applicaion.

when i install the the svn i got this error

how to solve this?

ruby script/plugin install svn://rubyforge.org/var/svn/flashplayrhelpr

svn: Can’t connect to host ‘rubyforge.org’: Connection refused

and also i try this

rake flash_player:install

(in /home/malathi/www/videoapp)
rake aborted!
Don’t know how to build task ‘flash_player:install’

(See full trace by running task with --trace)

Can’t connect to host ‘rubyforge.org’: Connection refused?

your network not fine?