In Stable version not install Instant Messaging
Download the IM from apps
and set the addons then Run the server
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 "/home/netpro/Latest 7.0/server/7.0/openerp/service/__init__.py", line 60, in load_server_wide_modules
    openerp.modules.module.load_openerp_module(m)
  File "/home/netpro/Latest 7.0/server/7.0/openerp/modules/module.py", line 415, in load_openerp_module
    getattr(sys.modules['openerp.addons.' + module_name], info['post_load'])()
  File "/home/netpro/Latest 7.0/web/7.0/addons/web/http.py", line 628, in wsgi_postload
    openerp.wsgi.register_wsgi_handler(Root())
  File "/home/netpro/Latest 7.0/web/7.0/addons/web/http.py", line 517, in __init__
    self.load_addons()
  File "/home/netpro/Latest 7.0/web/7.0/addons/web/http.py", line 580, in load_addons
    m = __import__('openerp.addons.' + module)
  File "/home/netpro/Latest 7.0/server/7.0/openerp/modules/module.py", line 133, in load_module
    mod = imp.load_module('openerp.addons.' + module_part, f, path, descr)
  File "/home/netpro/Latest 7.0/addons/7.0/im/__init__.py", line 2, in <module>
    import im
  File "/home/netpro/Latest 7.0/addons/7.0/im/im.py", line 33, in <module>
    from openerp.http import request
ImportError: No module named http
