Updating database object after a Signal is not working

So i am using django-paypal for a simple eCommerce website and my goal is to change the IPN's buyer fields to match the logged in user's registration info after a signal is received from paypal. Now I am almost there but there is something thats escaping me ... Here is the code

models.py

def view_signal(sender, **kwargs):      ipn_obj = sender      order = PayPalIPN.objects.get(txn_id=ipn_obj.txn_id) #getting the database object      user = Profile.objects.get(user=User.objects.get(username=ipn_obj.custom))  #getting the user object(when i send the info i send it with the custom field equal to the current user's username)      order.address_country = user.country #trying to change 1 field      order.save()      print order.address_country #It prints out correctly which makes me think everything is OK.        payment_was_successful.connect(view_signal)

Later when i check the field in the admin page it's still empty it hasn't change why is that?

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