Can't get Rewire to work with MaxMSP 4.6

Hello,

I can't get rewire to work with MaxMSP46 and Cubase SX3.
It's working fine with MaxMSP 4.5 and Cubase SX3.

MaxMSP46 says it is registered, restart your rewire host. But the rewire
host is not seeing maxmsp. I have nothing in the appropriate cubase
menu. It's the same with my application created with maxmsp46.

(I renamed maxmsp 4.6 rewire name to MaxMSP46 to avoid confusion).

Thanks for your help,
Chris