selection lists

Hi
Im trying to figure out how to make selection list work
My example for this is a Real estate web site
download the code here: [URL="http://www.qcm.co.il/real-
estate.rar"]http://www.qcm.co.il/real-estate.rar[/URL]

I have a table named "assets" and a table named "settlements"
and a relationship between them
[CODE]execute "alter table assets add constraint
fk_asset_settelments foreign key (settelment_id) references
settelments(id)"[/CODE]

in _form.rhtml the code is:
[CODE]<p><label for="asset_settelment_id">Settelment</label><br />
<%= collection_select(:asset, :settelment_id,
Settelment.find(:all, :order => "settelment"), :id, :settelment,
options ={:prompt => "select"}, :class =>"settelment") %>
</p>[/CODE]

when I try to update an asset settelment I get this error:

[QUOTE]NoMethodError in AssetController#update

undefined method `settelment_id=' for #<Asset:0x478694c>
RAILS_ROOT: ./script/../config/..

Application Trace | Framework Trace | Full Trace
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/
active_record/base.rb:1857:in `method_missing'
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/
active_record/base.rb:1672:in `send'
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/
active_record/base.rb:1672:in `attributes='
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/
active_record/base.rb:1671:in `each'
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/
active_record/base.rb:1671:in `attributes='
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/
active_record/base.rb:1591:in `update_attributes'
#{RAILS_ROOT}/app/controllers/asset_controller.rb:39:in `update'
Request

Parameters: {"commit"=>"Edit", "id"=>"1",
"asset"=>{"plot_area"=>"3500", "image_url"=>"",
"updated_at(1i)"=>"2008", "updated_at(2i)"=>"4",
"created_at(1i)"=>"2008", "created_at(2i)"=>"4",
"updated_at(3i)"=>"6", "created_at(3i)"=>"6", "updated_at(4i)"=>"09",
"settelment_id"=>"1", "updated_at(5i)"=>"33", "created_at(4i)"=>"09",
"created_at(5i)"=>"32", "price_dolar"=>"1100000", "price_shekel"=>"0",
"description"=>"Great house", "built_area"=>"230"}}

Show session dump

Response

Headers: {"cookie"=>[], "Cache-Control"=>"no-cache"}[/QUOTE]

Thank you in advance for your help
Please bear with me Im new to programing and my english is not perfect

you mix the spelling "settlements" and "settelments"

Thanks Thorsten