Cloning this repo is working, but the cloned app isn't

I cloned the repo http://github.com/dmonopoly/jdmedia with git clone git://github.com/dmonopoly/jdmedia.git and got the app and everything. It's an app in Rails 3, if that matters.

Anyway, after "cd jdmedia" I find that the app doesn't work, when I'm sure the app should. for example, typing rails -v or any rake command brings up this error:

undefined method `' for nil:NilClass

For the rails -v command, I get this:

C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/bundler/ lockfile_parser.rb:48:in `parse_source': undefined method `' for nil:NilClass (NoMethodError)         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/lockfile_parser.rb:20:in `send'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/lockfile_parser.rb:20:in `initialize'

        from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/lockfile_parser.rb:14:in `each'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/lockfile_parser.rb:14:in `initialize'

        from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/definition.rb:43:in `new'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/definition.rb:43:in `initialize'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/dsl.rb:122:in `new'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/dsl.rb:122:in `to_definition'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler/definition.rb:20:in `build'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler.rb:128:in `definition'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler.rb:116:in `load'         from C:/Ruby187/lib/ruby/gems/1.8/gems/bundler-1.0.0/lib/ bundler.rb:100:in `setup'         from C:/Documents and Settings/David Zhang/workspace/mediasite/ config/boot.rb:8         from script/rails:5:in `require'         from script/rails:5

The rails -v command works in other apps I have on my machine...so what is going on? Thanks in advance.