"gem install bundler" won't work with a project that includes a gemset(rvm) in Mac OS x 10.8.1

Question

My problem is summarized in the following lines:

Joses-MacBook-Pro:~ jose$ cd Estate/
Using /Users/jose/.rvm/gems/ruby-1.9.2-p290 with gemset realstate
Joses-MacBook-Pro:Estate jose$ bundle
ERROR: Gem bundler is not installed, run `gem install bundler` first.
Joses-MacBook-Pro:Estate jose$ gem install bundler
Successfully installed bundler-1.2.1
1 gem installed
Installing ri documentation for bundler-1.2.1...
Installing RDoc documentation for bundler-1.2.1...
Joses-MacBook-Pro:Estate jose$ bundle
ERROR: Gem bundler is not installed, run `gem install bundler` first.
Joses-MacBook-Pro:Estate jose$

Here's the output for my Gem Env:

RubyGems Environment:
  - RUBYGEMS VERSION: 1.8.24
  - RUBY VERSION: 1.9.3 (2012-04-20 patchlevel 194) [x86_64-darwin12.1.0]
  - INSTALLATION DIRECTORY: /Users/jose/.rvm/gems/ruby-1.9.3-p194
  - RUBY EXECUTABLE: /Users/jose/.rvm/rubies/ruby-1.9.3-p194/bin/ruby
  - EXECUTABLE DIRECTORY: /Users/jose/.rvm/gems/ruby-1.9.3-p194/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-darwin-12
  - GEM PATHS:
     - /Users/jose/.rvm/gems/ruby-1.9.3-p194
     - /Users/jose/.rvm/gems/ruby-1.9.3-p194@global
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://rubygems.org/

I've tried to solve this problem by using many answers I've seen around here, like: Ruby: "gem install bundler" not installing bundler

But unfortunately so far I've not been able to solve the problem, I hope somebody can help me out figuring this out. I'm a Mac OS X newcomer.

Thanks in advance !

EDIT:

which bundle:

Joses-MacBook-Pro:Estate jose$ which bundle
/Users/jose/.rvm/bin/bundle

$(which bundle)

which gem, etc

Joses-MacBook-Pro:Estate jose$ which gem || type gem | head -n 1
/Users/jose/.rvm/bin/gem
Joses-MacBook-ProEstate jose$ hash -r
Joses-MacBook-Pro:Estate jose$

Answer 1

you need to explicitly use ruby:

rvm use 1.9.3