RubyGems refuses to update from 1.3.1 to 1.3.5

Question

I can't update the rubygems from 1.3.1 to 1.3.5. I've tried the following commands with no luck(logged in as the root)

gem update --system

gem update rubygems

gem update rubygems -v 1.3.5

gem install rubygems-update -v 1.3.5

The response for the first three command is

Updating RubyGems
Nothing to update

while for the last one the response is

ERROR:  could not find gem rubygems-update locally or in a repository

Also the current rubygem fails to install some required gems such as 'geokit'. Could the problems be related?

Current Ruby version 1.8.5 on CentOS 5.0

Answer 1

This might sound silly but do you have gems.rubyforge.org in your remote sources?