7-STABLE not seeing second em interface on supermicro mb

[John Pettitt]

I just installed 7-STABLE on a new dual/quad machine based on a 
supermicro motherboard - it works fine except that it's not seeing the 
second network interface (em driver) - is there a magic incantation to 
make this work?


FreeBSD echelon.localnet 7.0-STABLE FreeBSD 7.0-STABLE #0: Fri Mar 21 
23:27:31 PDT 2008     
root at echelon.localnet:/usr/src/sys/amd64/compile/ECHELON  amd64

The only word from the em driver is this

em0: <Intel(R) PRO/1000 Network Connection Version - 6.7.3> port 
0x3000-0x301f mem 0xde200000-0xde21ffff irq 17 at device 0.0 on pci5
em0: Using MSI interrupt
em0: Ethernet address: 00:30:48:64:d9:45
em0: [FILTER]

ifconfig doesn't show anything other than em0 and lo0

Where should I start debugging this ?

John