I just figured that out hehe, anyway, from that spec sheet it seems as if windows is detecting the keyboard fine with no conflicts.
Have you messed with any BIOS settings? Try setting your BIOS to default, sometimes wrong settings can mess with peripherals.
I did notice this particular link you may want to try...
http://www.jsifaq.com/SF/Tips/Tip.aspx?id=5301
Also, you may want to try installing/re-installing IntelliType,
http://www.microsoft.com/hardware/mo...elliType%205.3