I just add this module in addons and than restart the services so i get this error:
File "/opt/openerp/openerp-7.0-20140519-231318/openerp/addons/im/__init__.py", line 2, in <module>
import im
File "/opt/openerp/openerp-7.0-20140519-231318/openerp/addons/im/im.py", line 30, in <module>
from openerp import http
ImportError: cannot import name http