[Bro] Signature example

[Vito Logrillo]

Hi all,
i'm studying the signature framework using the example described in
https://www.bro.org/sphinx/frameworks/signatures.html

I've made two files
-----mysig.sig----
signature my-first-sig {
    ip-proto == tcp
    dst-port == 80
    payload /.*root.*/
    event "Found root!"
}
-------------------------
-------mysig.bro---
@load base/frameworks/signatures/main.bro
@load-sigs ./mysig.sig
------------------------

i've tested the script using this link
www.testmyids.com
but doesn't work.
What's wrong?
Thanks,
Vito