Cant Install Mrp Module

I created new database on Debain 6 for Openerp. I am using Openerp version 6.0.3.

 I managed to configure the set up with Sales, Purchase, Warehouse, Accounting and Human Resources.

When I tried to install the Manufacturing module it gives me the following errror

Traceback (most recent call last):
File "/opt/openerp/server/bin/netsvc.py", line 489, in dispatch
result = ExportService.getService(service_name).dispatch(method, auth, params)
File "/opt/openerp/server/bin/service/web_services.py", line 599, in dispatch
res = fn(db, uid, *params)
File "/opt/openerp/server/bin/osv/osv.py", line 122, in wrapper
return f(self, dbname, *args, **kwargs)
File "/opt/openerp/server/bin/osv/osv.py", line 176, in execute
res = self.execute_cr(cr, uid, obj, method, *args, **kw)
File "/opt/openerp/server/bin/osv/osv.py", line 167, in execute_cr
return getattr(object, method)(cr, uid, *args, **kw)
File "/opt/openerp/server/bin/addons/base/module/wizard/base_module_upgrade.py", line 98, in upgrade_module
_db, pool = pooler.restart_pool(cr.dbname, update_module=True)
File "/opt/openerp/server/bin/pooler.py", line 60, in restart_pool
return get_db_and_pool(db_name, force_demo, status, update_module=update_module)
File "/opt/openerp/server/bin/pooler.py", line 39, in get_db_and_pool
addons.load_modules(db, force_demo, status, update_module)
File "/opt/openerp/server/bin/addons/__init__.py", line 883, in load_modules
processed_modules.extend(load_module_graph(cr, graph, status, report=report, skip_modules=processed_modules))
File "/opt/openerp/server/bin/addons/__init__.py", line 748, in load_module_graph
load_init_update_xml(cr, m, idref, mode, kind)
File "/opt/openerp/server/bin/addons/__init__.py", line 635, in load_init_update_xml
tools.convert_csv_import(cr, m, os.path.basename(filename), fp.read(), idref, mode=mode, noupdate=noupdate)
File "/opt/openerp/server/bin/tools/convert.py", line 947, in convert_csv_import
result, rows, warning_msg, dummy = pool.get(model).import_data(cr, uid, fields, datas,mode, module, noupdate, filename=fname_partial)
File "/opt/openerp/server/bin/osv/orm.py", line 870, in import_data
process_liness(self, datas, [], current_module, self._name, fields_def, position=position)
File "/opt/openerp/server/bin/osv/orm.py", line 820, in process_liness
res = _get_id(relation, line[i], current_module, mode)
File "/opt/openerp/server/bin/osv/orm.py", line 737, in _get_id
raise ValueError('No references to %s.%s' % (module, xml_id))
ValueError: No references to mrp.group_mrp_user

Please help me out

Thanks in advance

regards
Kaushik