Cookie Persist with Encryption Via IRule

Hello.

I have a VS configured for pool selection by context (via iRule). Also, I apply a different persist profile depending of the context.

ltm virtual VS-Pruebas_DGB_80 {
    persist {
        cookie_crypt {
            default no
        }
        source_addr {
            default yes
        }
    }
}

One of the profiles configured is a cookie insert profile with encryption.

ltm persistence cookie cookie_crypt {
    app-service none
    cookie-encryption required
    cookie-encryption-passphrase $M$Ex$TrRJFrQUr7JnneIQ9y9DDg==
    cookie-name WOW
    defaults-from cookie
}

Following the Persist Doc, I use next command to apply the cookie profile (cookie_crypt):

persist cookie insert

But doing that, the system only applies a generic cookie profile (without name and without encryption):

Set-Cookie: BIGipServerWebServer=2502459914.20480.0000; path=/

I need to configure an encrypted cookie persist profile using iRule. Any idea how to do that?

KR, Dario.