ImportError: No module named connector_ecommerce

Helo i'm trying to install the openerp connector for prestashop in openerp v7 i download the branchs y setup de openerp-server.conf with the new addons_path , but whe i run the server i get:

2014-02-05 12:35:47,750 22907 CRITICAL ? openerp.modules.module: Couldn't load module web
2014-02-05 12:35:47,751 22907 CRITICAL ? openerp.modules.module: No module named connector_ecommerce
2014-02-05 12:35:47,751 22907 ERROR ? openerp.service: Failed to load server-wide module `web`.
The `web` module is provided by the addons found in the `openerp-web` project.
Maybe you forgot to add those addons in your addons_path configuration.
Traceback (most recent call last):
  File "/opt/openerp/server/openerp/service/__init__.py", line 60, in load_server_wide_modules
    openerp.modules.module.load_openerp_module(m)
  File "/opt/openerp/server/openerp/modules/module.py", line 415, in load_openerp_module
    getattr(sys.modules['openerp.addons.' + module_name], info['post_load'])()
  File "/opt/openerp/web/addons/web/http.py", line 628, in wsgi_postload
    openerp.wsgi.register_wsgi_handler(Root())
  File "/opt/openerp/web/addons/web/http.py", line 517, in __init__
    self.load_addons()
  File "/opt/openerp/web/addons/web/http.py", line 580, in load_addons
    m = __import__('openerp.addons.' + module)
  File "/opt/openerp/server/openerp/modules/module.py", line 133, in load_module
    mod = imp.load_module('openerp.addons.' + module_part, f, path, descr)
  File "/opt/openerp/prestashoperpconnect/prestashoperpconnect/__init__.py", line 27, in <module>
    import prestashop_model
  File "/opt/openerp/prestashoperpconnect/prestashoperpconnect/prestashop_model.py", line 35, in <module>
    from .unit.import_synchronizer import (
  File "/opt/openerp/prestashoperpconnect/prestashoperpconnect/unit/__init__.py", line 26, in <module>
    import mapper
  File "/opt/openerp/prestashoperpconnect/prestashoperpconnect/unit/mapper.py", line 35, in <module>
    from openerp.addons.connector_ecommerce.unit.sale_order_onchange import (
  File "/opt/openerp/server/openerp/modules/module.py", line 132, in load_module
    f, path, descr = imp.find_module(module_part, ad_paths)
ImportError: No module named connector_ecommerce
2014-02-05 12:35:47,760 22907 INFO ? openerp.service.wsgi_server: HTTP service (werkzeug) running on 0.0.0.0:8069
2014-02-05 12:35:47,761 22907 DEBUG ? openerp.service.cron: cron0 started!
2014-02-05 12:35:47,761 22907 DEBUG ? openerp.service.cron: cron1 started!
2014-02-05 12:35:47,762 22907 INFO ? openerp: OpenERP server is running, waiting for connections...

Please any sugestion?
Thanks