'str' object has no attribute 'resolve' when access admin site

I keep getting this error: 'str' object has no attribute 'resolve'

when trying to accessing the django admin site and I can't figure out why. I have apps within my project that have their own admin.py files. Could this cause it? here is my urls.py:

from django.conf.urls.defaults import *
import settings
from django.contrib.auth.views import login, logout
from views import index, simple, complex
from django.views.generic.simple import direct_to_template

# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()
urlpatterns = patterns('',
    # Example:
    # (r'^django_jchat/', include('django_jchat.foo.urls')),
    # Uncomment the admin/doc line below and add 'django.contrib.admindocs'
    # to INSTALLED_APPS to enable admin documentation:
     (r'^admin/doc/', include('django.contrib.admindocs.urls')),
    # Uncomment the next line to enable the admin:
    (r'^admin/', include(admin.site.urls)), 

...

Heres the trace back:

'str' object has no attribute 'resolve'
Request Method:         GET
Django Version:         1.3
Exception Type:         AttributeError
Exception Value:
'str' object has no attribute 'resolve'
Exception Location:     /home/dockedin/webapps/peebletalk/lib/python2.7/
django/core/urlresolvers.py in resolve, line 252
Python Executable:      /usr/local/bin/python
Python Version:         2.7.1
Python Path:
['/home/dockedin/webapps/peebletalk',
 '/home/dockedin/webapps/peebletalk/lib/python2.7',
 '/home/dockedin/lib/python2.7',
 '/usr/local/lib/python27.zip',
 '/usr/local/lib/python2.7',
 '/usr/local/lib/python2.7/plat-linux2',
 '/usr/local/lib/python2.7/lib-tk',
 '/usr/local/lib/python2.7/lib-old',
 '/usr/local/lib/python2.7/lib-dynload',
 '/usr/local/lib/python2.7/site-packages',
 '/usr/local/lib/python2.7/site-packages/PIL']
Server time:    Wed, 10 Aug 2011 15:24:55 -0400
Traceback Switch to copy-and-paste view
    /home/dockedin/webapps