This works on my work computer, fails on laptop

rspec

gary-moores-macbook:artful.ly gary$ sudo bundle install
Password:
Using rake (0.8.7) 
Using abstract (1.0.0) 
Using activesupport (3.0.0) 
Using builder (2.1.2) 
Using i18n (0.4.1) 
Using activemodel (3.0.0) 
Using erubis (2.6.6) 
Using rack (1.2.1) 
Using rack-mount (0.6.13) 
Using rack-test (0.5.6) 
Using tzinfo (0.3.23) 
Using actionpack (3.0.0) 
Using mime-types (1.16) 
Using polyglot (0.3.1) 
Using treetop (1.4.8) 
Using mail (2.2.7) 
Using actionmailer (3.0.0) 
Using arel (1.0.1) 
Using activerecord (3.0.0) 
Using activeresource (3.0.0) 
Using awesome_print (0.2.1) 
Using bcrypt-ruby (2.1.2) 
Using cancan (1.4.0) 
Using culerity (0.2.12) 
Using nokogiri (1.4.3.1) 
Using ffi (0.6.3) 
Using childprocess (0.0.9) 
Using json_pure (1.4.6) 
Using rubyzip (0.9.4) 
Using selenium-webdriver (0.0.29) 
Using capybara (0.3.9) 
Using configuration (1.2.0) 
Using diff-lcs (1.1.2) 
Using json (1.4.6) 
Using term-ansicolor (1.0.5) 
Using gherkin (2.2.9) 
Using cucumber (0.9.2) 
Using cucumber-rails (0.3.2) 
Using database_cleaner (0.6.0) 
Using warden (0.10.7) 
Using devise (1.1.3) 
Using escape_utils (0.1.9) 
Using factory_girl (1.3.2) 
Using bundler (1.0.0.rc.2) 
Using thor (0.14.3) 
Using railties (3.0.0) 
Using rails (3.0.0) 
Using factory_girl_rails (1.0) 
Using faker (0.3.1) 
Using fakeweb (1.3.0) 
Using haml (3.0.21) 
Using launchy (0.3.7) 
Using macaddr (1.0.0) 
Using rspec-core (2.1.0) 
Using rspec-expectations (2.1.0) 
Using rspec-mocks (2.1.0) 
Using rspec (2.1.0) 
Using rspec-rails (2.1.0) 
Using shoulda (2.11.3) 
Using sqlite3-ruby (1.3.1) 
Using transitions (0.0.9) 
Using uuid (2.3.1) 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
gary-moores-macbook:artful.ly gary$ rspec spec/models/athena_chart_spec.rb 
/opt/local/lib/ruby/gems/1.8/gems/bundler-1.0.0.rc.2/lib/bundler/runtime.rb:27:in `setup': You have already activated rspec-core 2.2.1, but your Gemfile requires rspec-core 2.1.0. Consider using bundle exec. (Gem::LoadError)
	from /opt/local/lib/ruby/gems/1.8/gems/bundler-1.0.0.rc.2/lib/bundler/spec_set.rb:12:in `each'
	from /opt/local/lib/ruby/gems/1.8/gems/bundler-1.0.0.rc.2/lib/bundler/spec_set.rb:12:in `each'
	from /opt/local/lib/ruby/gems/1.8/gems/bundler-1.0.0.rc.2/lib/bundler/runtime.rb:17:in `setup'
	from /opt/local/lib/ruby/gems/1.8/gems/bundler-1.0.0.rc.2/lib/bundler.rb:102:in `setup'
	from /Users/gary/Documents/apps/artful.ly/config/boot.rb:8
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /Users/gary/Documents/apps/artful.ly/config/application.rb:1
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /Users/gary/Documents/apps/artful.ly/config/environment.rb:2
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /Users/gary/Documents/apps/artful.ly/spec/spec_helper.rb:3
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /Users/gary/Documents/apps/artful.ly/spec/models/athena_chart_spec.rb:1
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/configuration.rb:327:in `load'
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/configuration.rb:327:in `load_spec_files'
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/configuration.rb:327:in `map'
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/configuration.rb:327:in `load_spec_files'
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/command_line.rb:18:in `run'
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/runner.rb:55:in `run_in_process'
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/runner.rb:46:in `run'
	from /opt/local/lib/ruby/gems/1.8/gems/rspec-core-2.2.1/lib/rspec/core/runner.rb:10:in `autorun'
	from /opt/local/bin/rspec:19
gary-moores-macbook:artful.ly gary$