problem installing rails

Hi,
I'm installing rails on osx 10.3 (an old ibook) and I've this error:

$ sudo gem install rails --include-dependencies
Password:
INFO: `gem install -y` is now default and will be removed
INFO: use --ignore-dependencies to install only the gems you list
Updating metadata for 37 gems from http://gems.rubyforge.org/
.....................................
complete
Bulk updating Gem source index for: http://gems.rubyforge.org/
ERROR: While executing gem ... (Gem::RemoteSourceException)
    Error fetching remote gem cache: Errno::EPIPE: Broken pipe reading
http://gems.rubyforge.org/yaml

Ruby 1.8.6 and gem 1.1.1 are correctly installed on system
Any ideas?

Thanks,
G.

Try again. Sometimes the gem servers require a bit of persistence.