I have to program a file reclamation_workflow.xml and it doesn't work can you help me please

this the file code

reclamation_workflow.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <record id="reclamation_wkflow" model="workflow">
            <field name="name">reclamation.basic</field>
            <field name="osv">reclamation.workflow.model</field>
            <field name="on_create">True</field>
        </record>
       
         <!-- Activity -->
       
        <record id="act_draft" model="workflow.activity">
            <field name="wkf_id" ref="reclamation_wkflow"/>
            <field name="flow_start">True</field>
            <field name="name">draft</field>
            <field name="Kind">write({'state':'draft'})</field>
        </record>
       
        <record id="act_encours" model="workflow.activity">
            <field name="wkf_id" ref="reclamation_wkflow"/>
            <field name="name">en_cours</field>
            <field name="kind">function</field>
            <field name="action">write({'state':'en_cours'})</field>
        </record>
        <record id="act_trait" model="workflow.activity">
            <field name="wkf_id" ref="reclamation_wkflow"/>
            <field name="flow_stop">True</field>
            <field name="name">trait</field>
            <field name="kind">function</field>
            <field name="action">write({'state':'cloture_traite'})</field>
        </record>
       
        <record id="act_nontrait" model="workflow.activity">
            <field name="wkf_id" ref="reclamation_wkflow"/>
            <field name="flow_stop">True</field>
            <field name="name">annuler</field>
            <field name="kind">function</field>
            <field name="action">write({'state':'cloture_nontraite'})</field>       
        </record>
    
        <!-- Create transitions -->
        <!-- From Draft to en_cous -->
        <record id="trans_draft_encours" model="workflow.transition">
            <field name="act_from" ref="act_draft"/>
            <field name="act_to" ref="act_encours"/>
            <field name="signal">action_encours</field>
        </record>   
    </data>
</openerp>

// button on reclamation_view.xml

<!-- From draft to en_cours-->
                    <button string="Send to responsible" type="object" name="action_encour"
                    states="draft" class="oe_highlight"/>

/// the function action_encours on reclamation.py

def action_encour(self, cr, uid, ids, context=None):
        return self.write(cr, id, ids, {'state':'en_cours'})