Hmmm

Well looking at the trace it is clear that the Receiver never attempts to contact the PC to download the second kernel (firmware).

Also, it looks to me as if the DHCP exchange isn't completing sucessfully. It definitely doesn't go through the same stages as on my network using the Rio DHCP server. Without digging out of the details of DHCP/BOOTP I can't be sure if it is failing DHCP, or just falling back to BOOTP.

Can we see a trace relying on the built in DHCP server in the Rio software, with the one on the router disabled ?

Also, if you post more traces can you save them in one of the formats that Ethereal can read them in again ? (that would make it easier to analyse them)