OpenVPN disconnected with WAC124

Hello,

I have an internet box and a Netgear WAC124 connected as router to this internet box.

I am using OpenVPN on my computer to connect to my company network.

Previously I was connected to the internet box directly and it worked correctly.

Since I am connected to the Netgear WAC124, I am sometimes disconnected from the VPN but not from the network.

What I did wrong ?

Regards.