Secuextender VPN through USG110

Hello everyone,

I tried hard not to have to bug anyone, but I am getting nowhere and I feel an idiot. We have been using Secuextender to connect to a USG100 for years now, through a wireless router on our local end.

We upgraded the remote end to a newer Zyxel and took the USG110 and put it at our location, replacing the old wireless router. Now Secuextender won't let us connect!

Are there rules, ports or NAT that I must open up for this to happen? I didn't have to before so I am lost, confused and even more lost than that. Please help if you can.

Thank you,
Dave