Backbone View events not firing

I am using Rails3 as my backend and Jammit to asset... Now I am trying to not compress and even package the assets.

The simple event don't get run, but the alert('asd') int initialize is working as expected.

I have already tried other kinds of events in other objects too, but it didn't work.

My code as follow:

var InvoiceStock = Backbone.View.extend({
  initialize: function(args) {
    _.bindAll(this, 'find_product', 'product_added');

    this.products = new ProductCollection();

    this.products.bind('add', this.product_added);

    alert('asd');
  },

  events: {
    "keypress #product_finder": "find_product"
  },

  find_product: function(e) {
    alert('teste');
  },

  product_added: function(product) {
    alert('pqp4');
  }
});

and my RUBY HTML:

 <%= text_field 'search', :isbn_or_isbn10_or_publisher_or_authors_or_name_like, :id => 'product_finder' %> ou
 <%= link_to 'criar um produto', '', :id => 'new_product_link' %>.

which generates this:

<label>Adicionar</label>
<input id="product_finder" class="ui-autocomplete-input" type="text" size="30" name="search[isbn_or_isbn10_or_publisher_or_authors_or_name_like]" autocomplete="off" role="textbox" aria-autocomplete="list" aria-haspopup="true">
ou
<a id="new_product_link" href="">criar um produto</a>