my fields does not show up for some reason.  what im i missing

from openerp import models, fields, api
class ProductProduct(models.Model):
    _inherit = 'product.product'
    boatlenght = fields.Char(string="Lenght of the Boat", required=False, size=10 )    fuelcapacity = fields.Char(string="Fuel Capacity", required=False, size=10 )
<?xml version="1.0" encoding="utf-8"?>
<openerp>    <data>        <!-- Inherit Form View to Modify it -->        <record id="product_product_template_only_form_view" model="ir.ui.view">            <field name="name">new_view</field>            <field name="model">product.product</field>            <field name="inherit_id" ref="product.product_template_only_form_view"/>            <field name="arch" type="xml">               <field name="list_price" position="after">                   <field name="boatlenght"/>                   <field name="fuelcapacity"/>            </field>            </field>        </record>

    </data></openerp>