My project is not detecting the geodjango application

[sahitip]

Hello .. I want to have google maps in my application, so i created a project and in that made an application to handle the maps and made the required changes in the settings.py for the above. But i am getting the following error when i am trying to issue the command "python manage.py sqlall world"

Error: App with label world could not be found. Are you sure your INSTALLED_APPS setting is correct?

Can some one please help in this issue . And my models file is as follows:

from django.contrib.gis.db import models

class WorldBorders(models.Model):

# Regular Django fields corresponding to the attributes in the
# world borders shapefile.
name = models.CharField(max_length=50)
area = models.IntegerField()
pop2005 = models.IntegerField('Population 2005')
fips = models.CharField('FIPS Code', max_length=2)
iso2 = models.CharField('2 Digit ISO', max_length=2)
iso3 = models.CharField('3 Digit ISO', max_length=3)
un = models.IntegerField('United Nations Code')
region = models.IntegerField('Region Code')
subregion = models.IntegerField('Sub-Region Code')
lon = models.FloatField()
lat = models.FloatField()

# GeoDjango-specific: a geometry field (MultiPolygonField), and
# overriding the default manager with a GeoManager instance.

mpoly = models.MultiPolygonField()
objects = models.GeoManager()

# So the model is pluralized correctly in the admin.
class Meta:

verbose_name_plural = "World Borders"

# Returns the string representation of the model.
def unicode(self):

return self.name