happymapper fails

Auszug aus dem Script Console Log

>> @result = InlinkMapper::Result.parse(@inlink, :single => true)
=> nil
>> p @inlink
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<ysearchresponse xmlns=\"http://www.inktomi.com/\" responsecode=\"200\">\n  
<nextpage><![CDATA[/ysearch/se_inlink/v1/www.ischroedi.de?format=xml&count=10&appid=PvVLFJPIkY28DeDGfB6stqsOrWz48P6c5o4R_zLgNFk-&start=10]]></nextpage>\n  
<resultset_se_inlink count=\"10\" start=\"0\" totalhits=\"1363\" deephits=\"1370\">\n    
  <result>\n      
  <abstract><![CDATA[Sakuzaku provides software engineering and systems architecture consulting services, with a focus on fast, sleek, and modern Ruby on Rails and Web 2.0 applications <b>...</b>]]></abstract>\n      
  <clickurl>http://lrd.yahooapis.com/_ylc=X3oDMTRrYmgyMWE0BF9TAzIwMjMxNTI3MDIEYXBwaWQDUHZWTEZKUElrWTI4RGVER2ZCNnN0cXNPcld6NDhQNmM1bzRSX3pMZ05Gay0EY2xpZW50A2Jvc3MEc2VydmljZQNCT1NTBHNsawN0aXRsZQRzcmNwdmlkA3JudGFubUtJY3JwSTZOQXJJY20ySnhfcVVuRjVEMHBvaG5ZQUFLSl8-/SIG=1298qbfm0/**http%3A//blog.wearesakuzaku.com/installing-the-mysql-ruby-gem-on-os-x/</clickurl>\n      
  <title>Sakuzaku — Essays — Installing the Ruby mysql-2.7 gem on OS X 10.4</title>\n      <url>http://blog.wearesakuzaku.com/installing-the-mysql-ruby-gem-on-os-x/</url>
</result>\n 
</resultset_se_inlink></ysearchresponse>  
=> nil
>> @result.results.each do |i|
?> @mapper = Mapper.new
>> @mapper.Title = i.Title
>> @mapper.save
>> end
NoMethodError: You have a nil object when you didn't expect it!
The error occurred while evaluating nil.results
    from (irb):25

Controller:

require 'inlink_mapper'
[...]
 @result = InlinkMapper::Result.parse(@inlink, :single => true)   
p @result 
 @result.result.each do |i|
  @mapper = Mapper.new
  @mapper.Title = i.Title
  @mapper.Url = i.Url
  @mapper.ClickUrl = i.ClickUrl
  @mapper.save
end

Es kommt nichts an...

lib/inlink_mapper.rb
require 'rubygems'
require 'happymapper'

module InlinkMapper
  class Result
    include HappyMapper
    tag 'Result'
    #element :nextpage, String, :tag => 'Nextpage', :deep => true
    element :resultset_se_inlink, String, :tag => 'ResultSet_in_link', :deep => true
    element :abstract, String, :tag => 'Abstract', :deep => true
    element :result, String, :tag => 'Result', :deep => true
    element :title, String, :tag => 'Title', :deep => true
    element :url, String, :tag => 'Url', :deep => true
    element :clickurl, String, :tag => 'ClickUrl', :deep => true
  end
  
  class ResultSet
    include HappyMapper
    tag 'ResultSet'
    has_many :results, Result
  end
end

Model:
class Mapper < ActiveRecord::Base
  
end


Db Migration: 
class CreateMappers < ActiveRecord::Migration
  def self.up
    create_table :mappers do |t|
        t.string :Resultset_se_inlink
        t.string :Abstract
        t.string :Title
        t.string :Url
        t.string :ClickUrl
        t.timestamps
        end
      end

  def self.down
    drop_table :mappers
  end
end