Hello.. I am installing rails on my system..Below are problem I am facing after installation

As I open Command Prompt with Ruby and Rails I get following :

"

#Rails Environment Configuration.

C:/RailsInstaller/scripts/config_check.rb:28:in ``': No such file or directory - rails -v (Errno::ENOENT)

    from C:/RailsInstaller/scripts/config_check.rb:28:in `run'
    from C:/RailsInstaller/scripts/config_check.rb:83:in `<main>'

"

If I ignore above error and continue installing bundle and mysql..it also generate few error and after all that .. I am unable to open localhost:3000 due to all error..

Please help me to figure out solution of above error..

Thank you...!