Are you using the latest 3ware drivers and utilities release (9.5.2) or after?
Also did you check your 3ware firmware if it is up to date?

Our latest builds can be found at:
http://www.open-e.com/account/products-and-updates/
and for now the latest buils are
2011-05-06 v.6.00 up75 5377
2011-03-01 v.6.00 up65 5217
etc...

If you have everything updated, then could you please try to get from the link above the same build that you are running now, and try to download it and test it on a USB/CD and run your system to see if you can see the statistic from it as a demo now or not?