I have the Ruby version ruby 1.9.2p0 (2010-08-18) [i386-mingw32] installed in Windows7. and the gem vesion 1.3.7
When i tried to install mysql gem, it is showing
Have you installed the DevKit correctly? If doubt, cross check the steps of installation on - http://rorguide.blogspot.com/2011/03/installing-mysql2-gem-on-ruby-192-and.html
I was able to install mysql2 gem after following these steps.