Replace kanban image

I wanted to replace the kanban image from a company without an image. this is the XML I used. And I'm able to place that image on a form view but it won't work so far on the kanban view.

<field name="name">familae.res.partner.kanban</field>
                <field name="model">res.partner</field>
                <field name="inherit_id" ref="base.res_partner_kanban_view"/>
                <field name="arch" type="xml">           
                    <xpath expr="/kanban/div[@class='oe_kanban_vignette oe_semantic_html_override']" position="replace">
                         <div>
                             <a type="open">
                                <t t-if="record.has_image.raw_value === true">
                                    <img t-att-src="kanban_image('res.partner', 'image_small', record.id.value)" class="oe_kanban_image"/>
                                </t>
                                <t t-if="record.has_image.raw_value === false">
                                    <t t-if="record.is_company.raw_value === true">
                                        <img src="mymodule/static/src/img/myimage.png" class="oe_kanban_image"/>
                                    </t>
                                    <t t-if="record.is_company.raw_value === false">
                                        <img t-att-src="'_s' + '/base/static/src/img/avatar.png'" class="oe_kanban_image"/>
                                    </t>
                                </t>
                            </a>
                        </div>
                    </xpath>
                </field>

The logfile gives me this as errormessage:

2014-12-20 08:12:39,369 7031 ERROR openerpfamilae openerp.netsvc: ValidateError
Error occurred while validating the field(s) arch: Invalid XML for View Architecture!
Traceback (most recent call last):
  File "/home/openerp/server/openerp/netsvc.py", line 296, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)
  File "/home/openerp/server/openerp/service/web_services.py", line 626, in dispatch
    res = fn(db, uid, *params)
  File "/home/openerp/server/openerp/osv/osv.py", line 190, in execute_kw
    return self.execute(db, uid, obj, method, *args, **kw or {})
  File "/home/openerp/server/openerp/osv/osv.py", line 132, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/openerp/server/openerp/osv/osv.py", line 199, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/openerp/server/openerp/osv/osv.py", line 187, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/openerp/server/openerp/addons/base/module/module.py", line 426, in button_immediate_install
    return self._button_immediate_function(cr, uid, ids, self.button_install, context=context)
  File "/home/openerp/server/openerp/addons/base/module/module.py", line 477, in _button_immediate_function
    _, pool = pooler.restart_pool(cr.dbname, update_module=True)
  File "/home/openerp/server/openerp/pooler.py", line 39, in restart_pool
    registry = RegistryManager.new(db_name, force_demo, status, update_module)
  File "/home/openerp/server/openerp/modules/registry.py", line 233, in new
    openerp.modules.load_modules(registry.db, force_demo, status, update_module)
  File "/home/openerp/server/openerp/modules/loading.py", line 354, in load_modules
    loaded_modules, update_module)
  File "/home/openerp/server/openerp/modules/loading.py", line 256, in load_marked_modules
    loaded, processed = load_module_graph(cr, graph, progressdict, report=report, skip_modules=loaded_modules, perform_checks=perform_checks)
  File "/home/openerp/server/openerp/modules/loading.py", line 187, in load_module_graph
    load_update_xml(module_name, idref, mode)
  File "/home/openerp/server/openerp/modules/loading.py", line 74, in <lambda>
    load_update_xml = lambda *args: _load_data(cr, *args, kind='update_xml')
  File "/home/openerp/server/openerp/modules/loading.py", line 124, in _load_data
    tools.convert_xml_import(cr, module_name, fp, idref, mode, noupdate, report)
  File "/home/openerp/server/openerp/tools/convert.py", line 959, in convert_xml_import
    obj.parse(doc.getroot())
  File "/home/openerp/server/openerp/tools/convert.py", line 852, in parse
    self._tags[rec.tag](self.cr, rec, n)
  File "/home/openerp/server/openerp/tools/convert.py", line 819, in _tag_record
    id = self.pool.get('ir.model.data')._update(cr, self.uid, rec_model, self.module, res, rec_id or False, not self.isnoupdate(data_node), noupdate=self.isnoupdate(data_node), mode=self.mode, context=rec_context )
  File "/home/openerp/server/openerp/addons/base/ir/ir_model.py", line 971, in _update
    res_id = model_obj.create(cr, uid, values, context=context)
  File "/home/openerp/server/openerp/addons/base/ir/ir_ui_view.py", line 103, in create
    return super(view, self).create(cr, uid, values, context)
  File "/home/openerp/server/openerp/osv/orm.py", line 4551, in create
    self._validate(cr, user, [id_new], context)
  File "/home/openerp/server/openerp/osv/orm.py", line 1562, in _validate
    raise except_orm('ValidateError', '\n'.join(error_msgs))
except_osv: ('ValidateError', u'Error occurred while validating the field(s) arch: Invalid XML for View Architecture!')

Personally I can't get any information out of it but I hope it will help some of you with defining the problem.