The admin page always sais that.
OpenWRT on the NSLU2? Now that’s a new one. 😉
Check multicast settings on your router. It’s most likely that the router isnt forwarding broadcasts / multicasts.
You could verify this with a PC on the LAN or WLAN, runnig tcpdump or wireshark to see the absence of those packets.
Is there an alternate firmware for the Netgear? Your chances might be better there.