An error occurred while installing the old version of rails: bin_path': Can't Find gem railties (["3.0.5"]) with executable rails (GEM: gemnotfoundexception)

$ Rails _ 3.0.5 _ new depot
Rubygems. RB: 244: In 'bin _ path': Can't Find gem railties (["3.0.5"]) with executable rails (GEM: gemnotfoundexception)
Error
After you reinstall rails sudo gem install rails -- version 3.0.5
$ Rails _ 3.0.5 _ new depot
Dependency. RB: 247: In 'to _ specs': cocould not find rails (= 3.0.5) amongst [bundler-1.6.2, bundler-unload-1.0.2, executable-hooks-1.3.1, GEM-Wrappers-1.2.4, i18n-0.6.9, json-1.8.1, minitest-5.3.3, minitest-1.6.0, rake-0.8.7, rdoc-4.1.1, rdoc-2.5.8, rubygems-bundler-1.4.3, rvm-1.11.3.9, thread_safe-0.3.3] (GEM: loaderror)
From/usr/lib/Ruby/1.9.1/rubygems/dependency. RB: 256: In 'to _ spec'
From/usr/lib/Ruby/1.9.1/rubygems. RB: 1231: In 'G'
From/usr/local/bin/rails: 22: In '<main>'
Run the rvmsudo gem install rails -- version 3.0.5
Warning: Can not check '/etc/sudoers' For 'Secure _ path', falling back to call via '/usr/bin/ENV ', this breaks rules from '/etc/sudoers '. run:

Export rvmsudo_secure_path = 1

To avoid the warning, put it in Shell initialization file to make it persistent.

In case there is no 'Secure _ path' in '/etc/sudoers'. Run:

Export rvmsudo_secure_path = 0

To avoid the warning, put it in Shell initialization file to make it persistent.
Rails's executable "Rails" conflicts with railties
Overwrite the executable? [YN] y
Successfully installed rails-3.0.5
Parsing documentation for rails-3.0.5
Done installing documentation for rails after 0 seconds
1 gem installed

If not, bundle install and run rvmsudo gem install rails -- version 3.0.5 again.
Principle:
An error occurred while installing the path.
I try to explain this a bit because of the upvotes:
This basically is a path issue. if you set up gems via gem install, they mostly likely will be in another directory (e.g. /usr/local/) compared to gems set up via bundler (where you can override it with -- path ). using sudo may also set them up into another directory since sudo starts a subshell which has a different environment then. this is why you have rvmsudo.

If you want to see the differences, compare $ path, $ gem_home, $ gem_path and $ bundle_path when echoing directly, with sudo and with rvmsudo.