Error "...cannot load such file -- mysql2/2.0/mysql2 (LoadError)". On Windows XP with Ruby 2.0.0

The command `rails server` throws this error. ``` C:/Ruby200/lib/ruby/gems/2.0.0/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.rb:2:in `require': cannot load such file -- mysql2/2.0/mysql2 (LoadError) ``` I use Ruby 2.0.0 from RubyInstaller on Windows XP box. I figured out what is the problem but I don't know how to solve it. The problem is that there is no any `2.0/` directory in the `mysql2-0.3.11-x86-mingw32` gem. This is the gem that `rails` installs as its dependency from Gemfile: ``` GEM remote: https://rubygems.org/ specs: ... many gems here mysql2 (0.3.11-x86-mingw32) ... many gems here DEPENDENCIES ... mysql2 ... ``` This is what is in that `mysql2.rb` file: ``` # C:\Ruby200\lib\ruby\gems\2.0.0\gems\mysql2-0.3.11-x86-mingw32\lib\mysql2\mysql2.rb RUBY_VERSION =~ /(\d+.\d+)/ require "mysql2/#{$1}/mysql2" # <<-- this is that #2 line that throws an error ``` It is obvious that it takes the current Ruby version number and uses it as the path segment to reach some `mysql2` file. In fact it is `mysql2.so` file. As I use Ruby 2.0.0 the path segment is `2.0`: ``` mysql2/2.0/mysql2 ``` Ok, now lets see how that directory of `mysql2-0.3.11-x86-mingw32` gem looks like: ``` dir: C:\Ruby200\lib\ruby\gems\2.0.0\gems\mysql2-0.3.11-x86-mingw32\lib\mysql2\ ``` No any `2.0/` directory. I know the issue about libmysql.dll. I have it in my `C:\Ruby200\bin`. It doesn't help. I read this answer https://stackoverflow.com/a/5368767/1114926 from the creator of RubyInstaller. I tried but it didn't help. It works for `Ruby 1.9.3` because there is `1.9/` directory. But it doesn't work for `Ruby 2.0.0`. How to solve it? UPD 1: Thank you for your answer. I've tried. Unfortunately I have `ERROR: Failed to build gem native extension.` error: ``` C:\>gem install mysql2 --platform=ruby Temporarily enhancing PATH to include DevKit... Building native extensions. This could take a while... ERROR: Error installing mysql2: ERROR: Failed to build gem native extension. C:/Ruby200/bin/ruby.exe extconf.rb checking for rb_thread_blocking_region()... *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=C:/Ruby200/bin/ruby C:/Ruby200/lib/ruby/2.0.0/mkmf.rb:431:in `try_do': The compiler failed to generate an executable file. (Runtim eError) You have to install development tools first. ... other code follows here... ``` It says: You have to install development tools first. But I have full DevKit installed, RubyInstaller installs it. Can't understand what else does it need. I've already posted an issue to `mysql2` GitHub page https://github.com/brianmario/mysql2/issues/364. No answers yet.