Production server url not there but development server is?

I am running my app on the production server for first time. I have a url with admin logon enabled in the app.yml. The script runs when I browse to its URL when running on the development server. However, after uploading to the production server when I go to the same URL I get the following error:

The requested URL /tasks/ was not found on this server.

Why would this occur? I tried updating again.

The URL and script is the third one in the my app.yml file:

##app.yml file
application: generic_app_name
version: 1
runtime: python
api_version: 1

handlers:
    - url: /remote_api
      script: $PYTHON_LIB/google/appengine/ext/remote_api/handler.py
      login: admin

    - url: /stats.*
      script: $PYTHON_LIB/google/appengine/ext/appstats/ui.py

    - url: /tasks/SR2pop
      script: Popu开发者_如何学PythonlateSR2.py
      login: admin


    - url: /
      script: dbsample.py

---

Is the capitalization of your script exactly as specified in app.yaml? The production servers are case-sensitive, but if you're developing on Windows, the development server isn't. Check the capitalization of PopulateSR2.py matches the one in app.yaml.

Also, your file is called app.yaml, not app.yml, right?

---

Your 3rd handler is going to match only the exact string /tasks/SR2pop. None of your handlers will match /tasks/.