I am doing my first little steps with RoR on Windows.
Following the book I installed InstantRails but on my first attempt to run something I come to a screeching halt:

C:\InstantRails\rails_apps\shovell>ruby script/server
./script/../config/boot.rb:29: undefined method `gem' for main:Object (NoMethodE
from script/server:2

This was supposed to start WEBrick - I have no idea to look for and find what the problem might be.