Export image from OpenERP(7) to Prestashop 1.5

Hi , connector is working well except when I export a product from OpenERP (7) to Prestashop(1.5.x) I had made all possible update , but always has same error:

Traceback (most recent call last): File "/home/admin/openerp7/presta2/connector/queue/worker.py", line 122, in run_job job.perform(session) File "/home/admin/openerp7/presta2/connector/queue/job.py", line 465, in perform self.result = self.func(session, *self.args, **self.kwargs)
File "/home/admin/openerp7/presta2/prestashoperpconnect/unit/export_synchronizer.py", line 205, in export_record return exporter.run(binding_id, fields=fields)
File "/home/admin/openerp7/presta2/prestashoperpconnect/unit/export_synchronizer.py", line 81, in run self.binder.bind(self.prestashop_id, self.binding_id)
File "/home/admin/openerp7/presta2/prestashoperpconnect/unit/binder.py", line 138, in bind context=context
File "/home/admin/openerp7/presta2/connector/producer.py", line 52, in write result = write_original(self, cr, uid, ids, vals, context=context)
File "/home/admin/openerp7/server/openerp/osv/orm.py", line 4201, in write upd1.append(self._columns[field]._symbol_set[1](vals[field]))
File "/home/admin/openerp7/server/openerp/osv/fields.py", line 174, in <lambda> _symbol_f = lambda x: int(x or 0)

ValueError: invalid literal for int() with base 10: "{'prestashop': {'product': {'date_add': '2014-04-02 17:44:56', 'ean13': '1234567890005', 'id_default_image': {'attrs': {'not_filterable': 'true'}, 'value': ''}, 'advanced_stock_management': '', 'cache"