why can't i display my data onto my template and error on HttpResponse object

[NicMAN]

Hi i am getting an error with my add user form,first of all it won't
display any of my textfields and it keeps giving me an error saying
"The view add_user didn't return an HttpResponse object"

Here is my forms.py file

class UserForm(forms.Form):
    username = forms.CharField()
    password =
forms.CharField(widget=forms.PasswordInput(render_value=False),max_length=100)
    first_name = forms.CharField(max_length=20)
    last_name = forms.CharField(max_length=20)
    joined_on = forms.DateField()

Here is my views.py file

def add_user(request):
    if request.method == "POST":
        form = UserForm(request.POST)
        uform = UserForm(request.POST)
        if uform.is_valid():
            user = uform.save()
            return render_to_response ('links.html')
    else:
        return render_to_response('add_user.html')

Here is my add_user.html template
{% if error %}

        {{ error }}
                {% endif %}
                        <form action="." method="post">

        {{ form.as_p }}
                <input type="submit" value="Submit" />
        </form>

I am new enough to django, so some help would be greatly appreciated
thanks





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