Django doesn't look for static files in my app -

I have developed a stand-alone Django app that has a stable JS file. On some installations, the Django Development Server can not find the static file. The AP has been installed as a Python package with PIP, and I am in the site-package / app name / static / JS / myfile.js

Looking at the Django Debug Toolbar, and the "Stable" panel installed, I see a list of "stable file apps". My app is not listed there. How can I tell Django that it's in my app's static file folder Should also look?

I am using Django 1.6.3 with the following stable file finders:

  static_finders = (' 'Django.contrib.staticfiles.finders.AppDirectoriesFinder',)   
  django.contrib.staticfiles  app is installed.  
 Update: When using  manage.py collectstatic , files are not copied from the app.   
 
 
 OK, it was stupid.  
 The app was part of the earlier old project in question. I changed it to an  different  development machine on a free app when I wrap it up as an independent app, then I can copy the  myproject / myapp  folder to another machine Removed, and used the  pip installation  to install it in the virtual and project's projects.  
 Then I used this development machine, a  git pull  and  pip install . It does not delete *  myproject / myapp  folder - it only deletes all files managed by git  .pyc  files are not deleted, so keep the folder , And Zango are being removed from a  site-package    P>  myproject / myapp  rather than static files in that folder.