OpenVPN, dns request to SRM router not working?

[xvilar]

I've configured the OpenVPN server in SRM (in vpn plus server), and I've checked the 'allow clients to access local server LAN', and also the SRM internal ip address (192.168.1.1) for 'manual DNS'
Of course using OpenVPN subnetwork (172.22.0.0/24)
I'm able to connect to the VPN (with exported .ovn file, etc.) and it works Ok, I can reach the local network servers and devices I've running in my local network (192.168.1.0/24)
But I'm not able to do DNS request to SRM router (192.168.1.1)

I have created a firewall rule to let openvpn subnetwork send 53Tcp/udp requests to SRM router (192.168.1.1) ... and it does not work ???

Thanks!