Debian netboot on a SunFire v20z

[Michael Madden <madden@cmsrtp.com>]

Has anyone gotten a netboot install for amd64 working on a Sun SunFire
V20z?  I'm using the netboot from 12/21/2004.  It boots from the cd,
detects my Broadcom card, loads the tg3 module, configures the network,
obtains an IP address, netmask, gateway, and DNS servers from my DHCP server.
It then asks me to select a mirror (I have tried ftp.us.debian.org, 
mirrors.kernel.org, and numerous other foreign mirrors), and it gets the 
following error:

The installer failed to download a file from the mirror. This may be
a problem with your network, or with the mirror.  You can choose to 
retry the download, select a different mirror, or cancel and choose
another installation method.

I know the network card and the network are fine.  I recently installed
Solaris 10 b72 and Ubuntu on this server and connected to the network
without a hitch.  I've tried retrying, changing numerous ftp/http mirrors, 
and I always get the same error.  Any suggestions?

Thanks in advance,
Mike