AdGuard Home on FritzBox 7530 AX

[d4ndyl00k]

Hi everyone. I tried installing AdGuard Home on a mini PC with Debian 12, which I use with OpenMediaVault to share my personal music.
From the AdGuard Home graphical interface, I set the listening port to 55, resulting in the IP address 192.168.1.57.
Then I entered the FritzBox menu and set the above address as both primary and secondary DNSv4, since the router does not accept empty fields.
I restarted the router and, while browsing some ad-heavy websites, I noticed that ad blocking was not working. As confirmation, all statistics on the dashboard remained at 0.
I restored the previous AdGuard settings on the router, and everything started working correctly again.
I think I made a mistake in some configuration.
Could someone please help me?
Thank you.

[Dynamic5912]

Set it as the LAN DNS, not the WAN DNS