[web2py] Cannot Get Trivial routes.py Working

[Art Zemon]

Help! I feel like a dolt. I have a trivial routes.py installed in 
DOCROOT/web2py/routes.py:

   #!/usr/bin/python
   default_application = 'gotosigns'
   default_controller = 'default'
   default_function = 'invalid'
If I visit https://web2py.hens-teeth.net/ , I end up at 
https://web2py.hens-teeth.net/welcome/default/index instead of at 
.../gotosigns/default/invalid

What am I doing wrong???
How do you debug routes.py?

Thanks,
    -- Art Z.