Yamaha o1v mixers To Host Midid interface

Hi all. I´m trying to use the To Host feature on my o1v mixer as an midi interface with no luck. I got a cable and the Serial port drivers from yamaha and using Cubase VST 3.5. But getting nothing. Can some good soul help me solve this little prob?
THNX Nonni.

I think you need Cubase 3.7, but I've heard yhere are some problems with it. I'm waiting for 3.71 to try it out.