database problems

I have been having some problems when I changed a certain model in the models.py file : by creating new models or updating new fields of the models presents there, i wasn't getting any update . Changes I was making didn't appear in the database.

Here is some workaround.

First, I made a certain schema of my db, with South:

python manage.py schemeamigration pingpong --initial

pingpong is my rapidsms application, I am implementing,and it is done for the first time. after you just have to do :

python manage.py schemeamigration pingpong --auto

And the after all :

python manage.py syncdb