How to Connect Tyros 4 to Cubase 5

I got a Tyros 4 and like to connect to Cubase 5. I have already installed the USB drive download from Yamaha Website to my PC
Open my Cubase 5, and go to Device Manager, Install Device …But I can’t find the Tyros 4 name on the device list, What can I do wrong? how can I find the Tyros 4 on the Cubase Device list to install it?


Tyros 4 is listed on my Cubase 6