subsonic replies to ping of my printer

[OldMusic-transformer]

I installed subsonic premium, yesterday.
Then had problems connecting to a printer on my LAN.
ping of printer resulted in responses coming from IP address of subsonic saying that it was unreachable.
I ping 192.168.1.72 (my HP printer) and get responses from 192.168.74 (subsonic).
Why is this happening and how to better manage it?