Problematic Mass Assignment

_form.html.erb

 <div class="field">
    <%= f.label :notes %><br />
    <%= f.text_area :notes %>
  </div>

  <div class="field">
  <%= f.fields_for :rinkleagues do |builder| %>
    <fieldset>
      <%= builder.label :rinkleague, "Leagues" %>
      <%= builder.collection_select :RinkLeague, RinkLeague.all, :value, :display  %>
    </fieldset>
  <% end %>
</div> 

ErrorOutput.txt

Can't mass-assign protected attributes: rinkleagues, rinksurfaces, developmentalprograms

app/controllers/rinks_controller.rb:43:in `new'
app/controllers/rinks_controller.rb:43:in `create'

{"utf8"=>"✓",
 "authenticity_token"=>"x1fV0Snf9A7f2938b/UplmuVFRvPytZSPlCzxO07KPw=",
 "rink"=>{"name"=>"",
 "address1"=>"",
 "address2"=>"",
 "addresscity"=>"",
 "addressstate"=>"",
 "addresszip"=>"",
 "phone1"=>"",
 "phone2"=>"",
 "website"=>"",
 "surfacecount"=>"",
 "indoor"=>"0",
 "openhockey"=>"0",
 "sticktime"=>"0",
 "proshop"=>"0",
 "notes"=>"",
 "rinkleagues"=>{"RinkLeague"=>"youth"},
 "rinksurfaces"=>{"RinkSurface"=>"ice"},
 "developmentalprograms"=>{"DevelopmentalProgram"=>"youth"}},
 "commit"=>"Create Rink"}

rink.rb

class Rink < ActiveRecord::Base
  attr_accessible :address1, :address2, :addresscity, :addressstate, :addresszip, :indoor, :name, :notes, :openhockey, :phone1, :phone2, :proshop, :sticktime, :surfacecount, :website
  attr_accessible :rinkleagues_attributes, :rinksurfaces_attributes, :developmentalprograms_attributes
  
  has_many :RinkLeagues
  has_many :RinkSurfaces
  has_many :DevelopmentalPrograms
  accepts_nested_attributes_for :RinkLeagues
  accepts_nested_attributes_for :RinkSurfaces 
  accepts_nested_attributes_for :DevelopmentalPrograms
end

rink_league.rb

class RinkLeague < ActiveRecord::Base
  attr_accessible :display, :value
  
  belongs_to :Rink

end