W52P OpenVPN Config

[federiconeri]

I bought a W52P.
It work perfectly if i don't use OpenVpn.
When i try to configure the OpenVPN, i can't access anymore to the W52P config page. Obviously it doesn't work, so I can't call or receive phone call.
The only way to solve the issue is to reset to factory default the Base using the command on the phone.

I think i have something wrong in my openvpn config.

the config file is as following:
client
dev tun
remote XXX.XXX.XXX.XXX 8085 udp
ca /config/openvpn/keys/ca.crt
cert /config/openvpn/keys/client.crt
key /config/openvpn/keys/client.key
auth-user-pass /config/openvpn/keys/config.txt
resolv-retry infinite
nobind
persist-key
persist-tun
mute-replay-warnings
ns-cert-type server
comp-lzo
verb 3
mute 10