Making a midi track audible!

I’m really new to posting messages, but here goes.
I’m using Nuendo 6.5 and have been struggling to get my midi key board (KB) track to be audible. I have the KB hookup and can see signal from
the KB midi out to DAW midi in and from the DAW midi out back to the KB. Have recorded a track that is visible, so I know the track is there, but I can’t hear the sound when recording or when in playback.
This is the first time I have attempted to use midi for anything so I expect issues, but can’t seem to get around this. I’m sure its something simple but have spent so much time trying to figure it out I have given up. Any help would be greatly appreciated!

MIDI is not audio and needs a device that can create sound. Plenty Info about MIDI on the web, or in the manual. The chapter “VST instruments” might be a good place to start.
Apart from that, you’re in the german forums.

Oops! Thanks for letting me know. I’ll switch over to English.