network installation problem

I am attempting to install OpenBSD 3.6 on a microvax 3100 that I
have laying around. Following the documentation, I built an OpenBSD
I386 machine with some spare hardware to act as the installation source.

The PC configuration is listed at http://www.bakerjw.org/pcsetup.txt

When I >>>boot esa0 I get the following
 >> OpenBSD/vax boot [1.9] [Sep 10 2004] <<
 >> Press enter to autoboot now, or any other key to abort: 0
 > boot bsd
Trying BOOTPARAMS
No response for RARP request
nfs_open: must mount first.
bsd: boot failed: Invalid argument
 > boot bsd.old
Trying BOOTPARAMS
No response for RARP request
nfs_open: must mount first.
bsd.old: boot failed: Invalid argument
Trying BOOTPARAMS
No response for RARP request
nfs_open: must mount first.
 > boot bsd.gz
Trying BOOTPARAMS
No response for RARP request
nfs_open: must mount first.
bsd.gz: boot failed: Invalid argument
 >

So it's reading in the boot.mop as 08002b150bf9.SYS but not able to get 
any further.
I am not a Unix/OpenBSD expert. Any ideas?