No-Ip Server Problem

Hi'
I have No-Ip Server

I'm Give My Friend My Host In Client

And use "Mc"

But With My Friend Can't Login To Game !

I'm Try Give My Friend My Ip

But Can't Login To Game

Question:
How My Friend Can Login To Game ?

Have you give him your IPv4 Adresse ?

Yes I'm Try but My Friend Can't Login To Game

Is your Firewall off? And the Portmaps on?

Firewall off
And I'm open port in roter My Server "No-IP"

*I'm Using Wi-Fi To connect to the Internet