setting error (corrected)
I'm sorry my friend to be stupid. you are right.
every thing should be set with the URL Prefix. and what went wrong with me is that i didn't set the port number that i've been delivered by my testing server. I mean : MAMP server provide a port number to use in the URL address.
so, the URL in the Prefix should be : http://localhost:8888/vectograph/.
that how it works in the browser.
now i set it on my testing server configuration and it works properly.
Thanks for your assistance.