Drumcore 2 and Cubase 6

I can’t seem to sync up (via rewire) Drumcore 2.0 and Cubase 6(running snow leopard on a dual iMac).
Any suggestions? Thanks!

Try dis-abling Constrain Delay Compensation.

Not sure how to disable Constrain Delay Compensation in preferences.
It seems there is only a plus or minus value. My OS is 10.6. Thanks.