Hello, I'm using Openerp 7, I copied a wizard and tried to adapt it, but i had parse error on xml.

This is the architecture of my module :

My module 
 | wizard 
 | | __init__.py
 | | wizard.xml
 | __init__.py
 | __openerp__.py
 | analytic_account.py

account_analytic.py :

from osv import osv
from osv import fields

class AdquatWizard(osv.osv_memory):
    _name = 'eggs.jasper.location.valo.wizard'
    _description = 'adquat.valo.wizard'

    _columns = {
        'end_date': fields.date('End date'),
        'sav': fields.boolean('SAV'),
        'of': fields.boolean('OF'),
    }

AdquatWizard()

wizard.xml :

      <record id="view_eggs_jasper_location_valo_wizard" model="ir.ui.view">
         <field name="name">eggs.jasper.location.valo.wizard.form</field>
         <field name="model">adquat.valo.new.wizard</field>
         <field name="arch" type="xml">
               <form string="Parametres pour valorisation du stock">
                   <field name="end_date"/>
                   <group colspan="4" col="6">
                       <button icon="terp-gtk-go-back-rtl" string="Lancer" name="launch" type="object"/>
                        <button icon="gtk-cancel" special="cancel" String="Annuler"/>
                   </group>
               </form>
         </field>
      </record>


        <!--action-->
        <record id="action_valo_mensuelle" model="ir.actions.act_window">
            <field name="name">Valo mensuelle</field>
            <field name="type">ir.actions.act_window</field>
            <field name="res_model">account.analytic.account</field>
            <field name="view_type">form</field>
            <field name="view_mode">tree,form</field>
<!--            <field name="view_id" ref="adquat_valo_mensuelle.view_adquat_valo_mensuelle_wizard"/>-->
            <field name="view_id" ref="adquat_valo_mensuelle.view_eggs_jasper_location_valo_wizard"/>
            <field name="target">new</field>
        </record>

        <!--Menu-->
        <menuitem action="action_valo_mensuelle" id="action_valo_mensuelle"
            parent="account.menu_analytic_accounting"
            groups="analytic.group_analytic_accounting"/>

And i have AttributeError: 'nonetype' object has no attribute 'fields_view_get'

 , and parse error in the wizard near  <record id="view_eggs_jasper_location_valo_wizard" model="ir.ui.view">

I have doubts on the architecture, but less for the code itself because i copied it form an existant and working.

Thank you for your help !