changing vicidial files.php

[begginer]

good morning,
i try to change the interface of vicidial , so , i edit the files localed in the directory :/usr/src/astguiclient/www/vicidial/..., i do simple modifications, but changes are not applyed when i try to view the files in my browser.
- Is :/usr/src/astguiclient/www/vicidial/ the correct path ?if yes, why changes do not applyed.

thanks

[Op3r]

you should edit the php page on your apache document root like /var/www/html/agc/vicidial.php