Attack in Wan with NO-IP or Public IP

Hey guys,

I'm new in this site but I've already read some post about Kali Linux and Pentesting. I have a problem : today I wanted to start an attack in wan with NO-IP. I bought an annual subscription of Private Internet Access (dynamic IP) and for create a persistent backdoor in wan I need a static IP... for this reason I use No-IP. I followed this steps :

1. I created a payload with msfvenom and I used windows/meterpreter/reverse-tcp-dns and I set LHOST : "My-No-IP-Hostname"

2. I open the port 4444 of my local IP address.

3. I activated my Dynamic IP VPN (PrivateInternetAccess).

4. I started NO-IP hostname from Kali Linux terminal.

5. I started msfconsole and with windows/meterpreter/reverse-tcp-dns; LHOST: "MyLocalIP" and LPORT:4444

6. I started the .exe backdoor in another network.

After this step I can't do anything because the session doesn't open.

How can I fix the problem?

Thanks in advance