event: click on registration button of event form view gets error

Hello,

         Install Event

         Open event form view

         Click on registration button get this traceback,

2012-08-22 06:07:37,099 4356 ERROR None openerp.osv.osv: Uncaught exception
Traceback (most recent call last):
  File "/home/nco/workspace/rdtools/server/trunk/openerp/osv/osv.py", line 121, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/nco/workspace/rdtools/server/trunk/openerp/osv/osv.py", line 176, in execute
    res = self.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/nco/workspace/rdtools/server/trunk/openerp/osv/osv.py", line 164, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/nco/workspace/rdtools/addons/trunk/event/event.py", line 58, in name_get
    for record in self.browse(cr, uid, ids, context=context):
  File "/home/nco/workspace/rdtools/server/trunk/openerp/osv/orm.py", line 484, in __iter__
    raise NotImplementedError("Iteration is not allowed on %s" % self)
NotImplementedError: Iteration is not allowed on browse_record(event.event, 2)
2012-08-22 06:07:37,100 4356 ERROR None openerp.netsvc: Iteration is not allowed on browse_record(event.event, 2)

Thanks,
 NCO.