I've got a Powerbook 3400/200 with 48 mb RAM and OS 7.6.1 running OT 1.1.1. I'm using the built-in ethernet port.
I can't get MacIPX to open the driver. When I open the control panel, it tells me:
"Network Number: N/A (driver not opened)
Node Number: N/A (driver not opened)"
All the other macs on the network have never had a problem with this. I'm running system 7.6.1 and I've got 48 mb of RAM. All other ethernet connenctions (TCP/IP, AppleTalk) work without a hitch.