Hello Juan,
the first thing I would do is to check that the board is working OK. You will need a laptop to test it.
Once this is confirmed (if not, contact NI for a repair), it can be safely attributed to some incompatibility with the adapter.
At that point, I would check with Ricoh as they may have an updated driver for their board that fixes the issue, or they may have an idea on what's going on. Another thing would be to check your PCs BIOS configuration and see if any setting may help into solving the incompatibility (PCI settings, IRQs, bus-mastering, etc..)
As side suggestions, although I don't feel this will be the issue:
a)it's always advisable to use the latest version on the driver software -NI-488.2-, available at the web
b)check for an updat
e to the motherboard's BIOS at the manufacturer's site.
Regards,
JorgeM.