problem with controller loosing an id

Hey there, i am trying to set a site by the site_id of one of its
children, i think that after i destroy the child it looses the site i
am trying to create, the following code gives me an error about
couldn't find site with id=0

<td><%= link_to 'Destroy', { :action => 'destroy', :id => site_note },
                                                    :confirm => 'Are
you sure?',
                                                    :post => true

def destroy
    @site_note = SiteNote.find(params[:id])
    @site = Site.find(@site_note.site_id)
    redirect_to :action => 'list', :id => @site

any ideas ?