Problem with syncdb after installing designer

[starkoracles]

omer@omer-Inspiron-1440:~/web-sandbox/my_django_cms$ python manage.py syncdb
Error: One or more models did not validate:
form_designer_form.cmsformdefinition: 'form_definition' has a relation with model <class 'form_designer.models.FormDefinition'>, which has either not been installed or is abstract.

omer@omer-Inspiron-1440:~/web-sandbox/my_django_cms$

[faebser]

Make sure that after you added

'form_designer.contrib.cms_plugins.form_designer_form'

to your INSTALLED_APPS to run

manage.py syncdb