Rails 3 not working with windows 7

Manish Nautiyal
2010-09-06T17:55:48Z

ruby 1.8.7
gem 1.3.7
rails 3.0.0, 3.0.0.rc

when i write rails -v
error message come

Could not find gem ''mysql2 <>=0, runtime>'' in any of
the gem sources.
Try running ''bundle install''.

when I run bundle install then also it cann''t install mysql2


please help me.