Problem with running "WEbrick"

Hi
After I installed ruby 1.9.2p290(with rubyInstaller) on windows 7 and
connected MySQL to it ( I checked it
and it worked ) I installed rails then I create a project on

"C:\Users\Amiref\Documents\Sites\simple_cms"

with this order : "rails new simple_cms -d mysql"
then when I use "rails server" to run webrick I saw this error on
command prompt :

"rails.bat :
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.rb:2:in
`require': Incorrect MySQL client library version! This gem was compile
d for 6.0.0 but the client library is 5.1.45. (RuntimeError)
At line:1 char:6
+ rails <<<< server
    + CategoryInfo : NotSpecified: (C:/Ruby192/lib/...
(RuntimeError):String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError

    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.rb:2:in
`<top (required)>'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2.rb:9:in
`require'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2.rb:9:in
`<top (required)>'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in
`require'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in
`block (2 levels) in require'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in
`each'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in
`block in require'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in
`each'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in
`require'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/bundler-1.0.21/lib/bundler.rb:122:in
`require'
    from
C:/Users/Amiref/Documents/Sites/simple_cms/config/application.rb:7:in
`<top (required)>'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:52:in
`require'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:52:in
`block in <top (required)>'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:49:in
`tap'
    from
C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.1.3/lib/rails/commands.rb:49:in
`<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'
"

please help me to solve this big problem.

Have you checked your Gemfile?

Javier

Javier Quarite wrote in post #1035799:

"rails.bat :

C:/Ruby192/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.rb:2:in

`require': Incorrect MySQL client library version! This gem was compile
d for 6.0.0 but the client library is 5.1.45. (RuntimeError)

Have you checked your Gemfile?

Javier

No, What can I do with Gemfile?

Please see my response to your question on stackoverflow:
http://stackoverflow.com/questions/8438990/some-issue-with-running-webrick/8439144#8439144