AttributeError: 'list' object has no attribute 'get'

I have to Magentos connected to the same ERP.

revno: 685 (stable-6.1)
openerp-server : revno -> 348

Every Magento have different Main webstore name, view etc.

IN the connector I have put different prefix for each store in sale orders.

I've sync a few orders without problems, but now I'm getting this error and I'm unable to sync orders.

Website: Login Successful
2013-05-09 08:53:47,975 8922 ERROR ? Dia Website: 'list' object has no attribute 'get'
Traceback (most recent call last):
  File "/opt/openerp/server/openerp/addons/base_external_referentials/decorator.py", line 130, in wrapper
    response = func(self, import_cr, uid, external_session, resource, *args, **kwargs)
  File "/opt/openerp/server/openerp/addons/base_sale_multichannels/sale.py", line 606, in _record_one_external_resource
    mapping, mapping_id = self._init_mapping(cr, uid, external_session.referential_id.id,
  File "/opt/openerp/server/openerp/addons/base_sale_multichannels/sale.py", line 590, in check_if_order_exist
    mapping=local_mapping,
  File "/opt/openerp/server/openerp/addons/base_external_referentials/decorator.py", line 49, in wrapped
    return func(self, cr, uid, argument, *args, **kwargs)
  File "/opt/openerp/server/openerp/addons/magentoerpconnect/sale.py", line 409, in _transform_one_resource
    resource = self.clean_magento_resource(cr, uid, resource, context=context)
  File "/opt/openerp/server/openerp/addons/magentoerpconnect/sale.py", line 595, in clean_magento_resource
    if not resource['shipping_address'].get('customer_id'):
AttributeError: 'list' object has no attribute 'get'
2013-05-09 08:53:47,984 8922 INFO ? Dia Website: Calling Method:sales_order.done,Arguments:[u'100000018']