Apptrace import error

apptrace.log

>>> import apptrace.middleware
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/site-packages/apptrace-0.2.2-py2.5.egg/apptrace/middleware.py", line 18, in <module>
    from instruments import Recorder
  File "/usr/lib/python2.5/site-packages/apptrace-0.2.2-py2.5.egg/apptrace/instruments.py", line 23, in <module>
    from django.utils import simplejson
ImportError: No module named django.utils


It worked after i changed that import statement to simplejson

google-appengine Version        : 1.5.0-1