REST in rails 1.2.5

Hi
     I am using rails 1.2.5 And as part of learning rails I just create
a model Person and migrated it (I am following the REST for rails 2
tutorial from peepcode) Then did ./script/generate scaffold Person

     Now inside config/routes.rb added map.resources :people
  In people controller index action
def index
    @person_pages, @people = paginate :people, :per_page => 10
    respond_to do |format|
       format.html
       format.xml { render :xml => @people }
    end
end
     And also have the view file Now when http://localhost:3000/people
I get the data displayed But when
http://localhost:3000/people.xml I get

XML Parsing Error: unclosed token
Location: http://localhost:3000/people.xml
Line Number 1, Column 1:

              could you please tell why this error happens?Also is there
huge differnece in REST for rails 1.2.5 and 2.x

Thanks in advance
Sijo