Just received my Plipbox and I'm having a similar problem. It's hooked up to the same switch as my PC but I can't get an IP from my router via DHCP. Doesn't work if I assign a static IP on my subnet either, I can ping 127.0.0.1 but not my router. I'm using driver and firmware 0.6, Miami Deluxe and OS 3.9 on an A2000. If I make any progress with it I'll let you know. :/