Can't dhcp boot compaq with 3com

[James Call]

I am setting up some "new" compaq en 266 64mb computers in our lan
with 3com cards 905c-txm.
These are the same cards that boot perfectly off of dell optiplex gx1 350mhz.
They seem to boot until they get to the part where I think they hook up to dhcp

IP-Config: eth0 hardware address 00:08:c7:ea:3a:0e mtu dhcp RARP

They get here then freeze.
Does anyone know where I can get some help?
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Thanks, James