Rake Error while trying to run `rake db:create` in project

i'm new to Ruby and using RubyMine environment. i'm using sqlite3.

when i try to create db - rake db:create i am getting the following error:

rake aborted!

no such file to load -- bundler/setup

(See full tra开发者_Python百科ce by running task with --trace)

please help me :)

i'm using ruby 1.8.7, rails 2.3.5 and RVM on mac osx

---

sudo gem install bundler --no-ri --no-rdoc