openbsd 3.4 and 3.5 install hangs

we're trying our first openbrick install and haven't been able to get 
through the boot process for installation yet. we have an OpenBrickE with 
512MB CF card, no hard drive and using USB floppy. the last few lines we 
see before the boot hangs are:

pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0

we've verified that the boot disk will work by booting another PC system, 
and have tried OpenBSD 3.4 and 3.5, but everything freezes at the same 
spot. 

any ideas would be greatly appreciated.

tia,
Chris