How do I get my MIDI keybard to play from my computer

[Butchie12]

Hello,
Trying to get my Yamaha DGX 640 to play MIDI files from my Dell Inspiron computer. Installed the MIDI driver from Yamaha, computer shows the keyboard on control panel, plays a MIDI file thru the computer, but does not play the keyboard. Is there something I am missing?

 

[WR2]

MIDI driver is OK.
What about the MIDI software?