'role' is an invalid keyword argument for this function

error.py

#models.py
class Player(models.Model):
    first_name = models.CharField(max_length=32)
    last_name = models.CharField(max_length=32)
    team = models.ForeignKey(Team)
    role = models.ManyToManyField(Roles)
    preffered_position = models.IntegerField(max_length=3,choices=zip(range(1,12),range(1,12)) , default=1)
    status = models.BooleanField(default=True)

#forms.py
class PlayerForm(forms.Form):
    first_name = forms.CharField()
    last_name = forms.CharField()
    role = forms.ModelMultipleChoiceField(
        Roles.objects.all(),
        widget=CheckboxSelectMultiple
    )

#views.py
@login_required
def add_player(request, team_id):
    template = get_template('cricket/addplayer.html')
    userteam = Team.objects.get(owner=request.user)
    currentteam = Team.objects.get(id=team_id)
    #now on to permissions .. if userteam = currentteam, the display form, otherwise display error 
    if userteam == currentteam:
        if request.method == 'POST':
            form = PlayerForm(request.POST)
            if form.is_valid():
                Player.objects.create(
                    first_name = form.cleaned_data['first_name'],
                    last_name = form.cleaned_data['last_name'],
                    team = Team.objects.get(id=team_id),
                    role = form.cleaned_data['role'],
                )

                return HttpResponseRedirect('/team/%s/' % team_id)
        else:
            form = PlayerForm

        page_vars = Context({
            'form': form,
            'loggedinuser': loggedinuser,
            'team': userteam,
            })

        crsfcontext = RequestContext(request, page_vars)

        output = template.render(crsfcontext)
        return HttpResponse(output)
    else:
        error = "Permission Denied: You cannot add player to " + str(currentteam.name)
        page_vars = Context({
            'loggedinuser': loggedinuser,
            'error': error,
        })

        crsfcontext = RequestContext(request, page_vars)

        output = template.render(crsfcontext)
        return HttpResponse(output)

stack trace:

Environment:

Request Method: POST
Request URL: http://localhost/team/1/player/add/

Django Version: 1.3
Python Version: 2.7.2
Installed Applications:
['django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'djangocricket.Cricket',
'djangocricket.cms']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware')

Traceback:
File "/usr/lib/pymodules/python2.7/django/core/handlers/base.py" in get_response

1.                     response = callback(request, _callback_args, *_callback_kwargs)
   

   File "/usr/lib/pymodules/python2.7/django/contrib/auth/decorators.py" in _wrapped_view

2.             return view_func(request, _args, *_kwargs)
   

   File "/home/yousuf/cricket/djangocricket/Cricket/views.py" in add_player

3.                 role = form.cleaned_data['role'],
   

   File "/usr/lib/pymodules/python2.7/django/db/models/manager.py" in create

4.     return self.get_query_set().create(**kwargs)
   

   File "/usr/lib/pymodules/python2.7/django/db/models/query.py" in create

5.     obj = self.model(**kwargs)
   

   File "/usr/lib/pymodules/python2.7/django/db/models/base.py" in init

6.             raise TypeError("'%s' is an invalid keyword argument for this function" % kwargs.keys()[0])
   

Exception Type: TypeError at /team/1/player/add/
Exception Value: 'role' is an invalid keyword argument for this function