Change your buffer size. I think the lower your buffer size, the less latency.
How much altency are you talking? Like enough to be able to notice it when recording?
In Cubase VST all i did was tick the ASIO direct monitoring box to get rid of my latency(which was like 0.5secs!). Could be something like that.
Loading up the KX driver seems to have done the trick.
At the time, the buffer size in Sonar had already been reduced as low as it could go without dropping out and sounding like crap. With the new driver, I have reduced it even lower than I could before.