No data displayed when using django ModelForm with Foreign key - django

Question

I'm trying to display a django ModelForm in my template, but I could not get it to work.
Here is my code:
the template is this:
{% extends 'base.html' %}
{% load i18n %}
{% load url from future %}
{% block content %}
{{ block.super }}
<section>
<article>
<form action="{% url 'SaisirEnfant' %}" method="post">{% csrf_token %}
<fieldset>
<div id="newad"> {{ newenfant.as_p }} </div>
<div id="sub"> <input type="submit" value="Submit" /> </div>
</fieldset>
</form>
</article>
</section>
{% endblock %}
and the models are like this:
class PersonneAdulte(models.Model):
profile = models.ForeignKey(Profile, verbose_name='Personne Adulte')
prenom = models.CharField(max_length=50)
responsable = models.BooleanField(default=False, verbose_name=_('responsable'))
class Famille(models.Model):
responsable = models.ForeignKey(PersonneAdulte, verbose_name='responsable')
sous_responsable = models.IntegerField(null=True, blank=True)
coef_fam = models.IntegerField(null=True, blank=True)
id_fam = models.IntegerField(null=True, blank=True)
class Enfant(models.Model):
responsable = models.ForeignKey(Famille, verbose_name='responsable')
nom = models.CharField(max_length=50 )
finaly the wiews is like this:
class PersonneAdulteForm(ModelForm):
class Meta:
model = PersonneAdulte
exclude = ('profile')
def PersonneAdulte(request):
if request.method == 'POST':
adulte = PersonneAdulteForm(request.POST)
if adulte.is_valid():
#creates a new `User`.
new_user = UserenaSignup.objects.create_user(username=adulte.data['nom'],
email='nom.prenom#site.fr',
password='0000',
active=False,
send_email=False)
# Send the signup complete signal
userena_signals.signup_complete.send(sender=None,
user=new_user)
#Activate a user with an activation key.
activation_key = UserenaSignup.objects.get(user_id=new_user.id).activation_key
user = UserenaSignup.objects.activate_user(activation_key)
t = adulte.save(commit=False)
if t.responsable == False :
new_user.is_active = False
new_user.save()
else :
f = Famille.objects.create(pk=new_user.id, responsable_id=new_user.id, id_fam=new_user.id)
p = adulte.save(commit=False)
p.id = p.profile_id = new_user.id
p.save()
return HttpResponse( 'id: ' + str(p.id) )
else:
adulte = PersonneAdulteForm()
return render_to_response('familles/PersonneAdulte.html', dictionary={ 'adulte' : adulte}, context_instance=RequestContext(request))
Profile is the model defined by the userena package
My view is for creating a new Enfant instance but no data at all is displayed and there is no error message. The problem is related to the foreign key in my model (responsable) because if I exclude the field in my form it works fine. Anybody knows where this problem comes from or how I can debug it?