Yes, swapping slots DOES make a difference!
Xircom PCMCIA Ethernet Adapter Issues
Xircom CE2 not identified on Toshiba 4030CDT (Tony Kerr)
I think it is really a Toshiba issue (David Hinds)
Date: 2000, Mar 24
From: Tony Kerr tkerr
Now I'm kicking myself that I didn't think to try it. The CE2 seems to be quite happy to come up in socket 0, but not in socket 1. I haven't tried the modem in socket 1 yet, though.
to: "Yes, swapping slots DOES make a difference!"