Hi i am installing ruby on rails.

I installed version 3.0.0 and then wanted to update it to version 3.0.1

So i removed the executable files by giving

gem uninstall rails

Then i again tried installing by giving

gem install rails -v 3.0.1

It says

Succesfully installed rails-3.0.1
1 gem installed
Installing ri documentaion details for rails -3.0.1
File not found: lib

I tested by giving

rails -v

Now it is saying an error called

Could not find gem 'sqlite3-ruby (>= 0, runtime)' in any of the gem sources list
ed in your Gemfile.
Try running `bundle install`.

Can anyone tell me what i am missing. I am using WINDOWS 7