Edge Rails: parse error, unexpected $, expecting kEND

Hi --

New to this environment and working my way through "Agile Web
Development with Rails". I had a problem with decimal fields and am
using Edge Rails now to get around that issue - only I am now
experiencing other problems...

If you have this book, the exercise is Iteration A4: Prettier Listings

I have generated some ruby script with the command: ruby script/generate
scaffold product admin

The script produced is as follows:

class AdminController < ApplicationController
def index

...

When this script is called (http://localhost:3000/admin the following
error is generated:

app/models/product.rb:11: parse error, unexpected $, expecting kEND
RAILS_ROOT: script/../config/..

It's hard to know the problem without seeing product.rb.

David