Connecting M-Audio Keystation 88 to Cubase LE

I cannot connect my M-Audio Keystation 88 to Cubase LE and I don’t understand what’s wrong.
I connected my Keystation 88 to my PC (Windows 8.1) with the USB cable and turned on the power of my keyboard. The LED light on the keyboard is lightened and there is a sound signal from my PC indicating that it is able to detect the connected device. However nothing else happened. Nothing new appeared in the “Midi port setup” of the “Device setup” in my Cubase. There is only a device named “Windows MIDI” but it has already been there before I connected my keyboard. Please check the attached for the screenshot.

I have no idea what has gone wrong. Can anyone help me? Thanks so much!!!
Cubase device setup midi port setup.PNG

Hi,

Make sure, the driver is installed.

Restart Cubase, please. Turn On and Connect the keyboard first, then launch Cubase.