gPXE Second network card "Cannot start" W2kr2 iSCSI boot

Hola peeps :-)

I'm booting windows 2k3 R2 Advanced by iSCSI from one network card (SAN 
side).

Windows fails to bring up the second card (Access & domain side) 
claiming the device cannot start, however if I disable and then enable 
the hardware it works fine.

The hardware I am using is an IBM HS20 blade, with a broadcom5704 
chipset dual port network card. The units don't have iSCSI boot 
initiators, so I'm chain booting gPXE from PXE to boot windows by iSCSI 
from a SAN LUN.

I'm using the most recent driver for this chipset from the broadcom 
site, and I've tried with the most recent from the IBM site too.
I've tried all relevant BIOS permutations


Current startup script:

#!gpxe
sanboot iscsi:192.168.200.2::::iqn.2009-09.local.sanside:bl02



Anyone got any ideas?

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