Michael Hartl's rails 2.3 tutorial Installing RSpec

I am following this tutorial book that involves signing up and user creation for my application that I am developing. Now as per chapter 3 in the book, Michael asks us to install Rspec for Testing the application step by step. after putting the codes like:

[sudo] gem install rspec -v 1.3.0

[sudo] gem install rspec-rails -v 1.3.2

I get the following errors.

ERROR: http://gems.rubyforge.org/ does not appear to be a repository

ERROR: could not find gem rspec locally or in a repository

I have been trying to install and update my rails too but I keep getting this error.. I agree there are some security measures that are involved from my institution for downloading plugins and libraries, and after confirming with them I have been offered privileges with new proxy and port settings. I have read many threads involvi开发者_JS百科ng this error message from the terminal but none solved my issue. Would be grateful if some one could clear this big problem Cheers

Have you looked at this thread?