Any extra info ?
what type of miggy you`re plugging it into?
what (if any) other cards are installed ?
I read there are problems with some addon ZII busboards for the A1200 and the Highway, and some ZII cards aren`t built to the ZII spec and can cause problems to any cards behind it on the bus.
If it`s not there already, try moving the card to the first ZII slot.
If it still doesn`t work, there`s a Highway/Poseidon Yahoo group that might be able to help while you wait for email replies.
http://groups.yahoo.com/group/highway_usb/
