Heroku problems on Windows 7 (cmd)

Question

I just installed the heroku ruby gem on Windows 7 and received the following error when trying to create a new instance. Have been researching the cause for the past two days with no luck.

C:\Users\admin\RubymineProjects\first_app>heroku create
Invalid gemspec in [C:/RailsInstaller/Ruby1.8.7/lib/ruby/gems/1.8/specifications
/heroku-2.8.5.gemspec]: invalid date format in specification: "2011-10-05 00:00:
00.000000000Z"
C:/RailsInstaller/Ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems.rb:926:in `report_ac
tivate_error': Could not find RubyGem heroku (>= 0) (Gem::LoadError)
        from C:/RailsInstaller/Ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems.rb:244:
in `activate_dep'
        from C:/RailsInstaller/Ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems.rb:236:
in `activate'
        from C:/RailsInstaller/Ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems.rb:1307
:in `gem'
        from C:/RailsInstaller/Ruby1.8.7/bin/heroku:18

C:\Users\admin\RubymineProjects\first_app>