The most basic midi question there is

To isolate the problem, with the Kontakt Instrument as a simple insturment track:

1-Try to use the keyboard in the Kontakt player.  Click notes with the mouse and see if you hear anything and if there is a signal on the track meter.  If the Kontakt player meter shows a signal but no sound comes out through Sonar, i would think you have an issue with routing the track.  Be sure the track goes to Master, Master goes to you main outputs, the faders are up, and there is nothing muted or soloed.  Also, be sure you only have one instrument loaded into Kontakt.  Why?  Because if you keep loading instruments without closing others, it can be quite confusing which are active, which are assigned to which MIDI channels, etc.  Best to just try to get one thing working.
2-If #1 works, the try to open Staff view for the Kontakt track and use the pencile to put a few random notes around the staff.  Then play the track and see if those make sound.

Let us know what happens and maybe we can go from there.  Good luck.

BHy the way, be sure to select a generic sound in Kontakt that plays all across the keyboard (like electric piano or something).  If you have a weird sound with a slow attack or that is limited to a small range of notes, that could confuse things.

No worries, synkotron.  My PC actually locked up before I could add something anyway.  (By the way, if I were not already The Mighty Konrad, I would want my name to be synkotron.  I don't know how you came up with that, but it is an awesome name.  It is even better than my second choice for a name: Bala, The Monkey God.)

Steven, Can you drag a little wav or mp3 into an audio track in Sonar and hear it when you hit play?  I just want to make sure your entire audio output is not missing or else we may end up chasing the wrong problem.

The Mighty Konrad, yes, I've been recording some audio tracks as I test all this and audio works great, just this midi problem...

Thanks

Must come up with nickname now.

konradh

(By the way, if I were not already The Mighty Konrad, I would want my name to be synkotron.  I don't know how you came up with that, but it is an awesome name.  It is even better than my second choice for a name: Bala, The Monkey God.)  

LOL, Konrad, I chose that name in 2000 when I first started to publish my home made stuff on MP3 dot com. Took me ages to find a name that wasn't used by anyone else and I felt, at the time, that it was important. No google back then either, I don't think, or it was its early days. Each name I chose, and there were many, was already in use. Eventually, I made up this name, did a search, and it is the Swedish spelling of a scientific piece of kit for acceleration electronic particles.


There is a Swedish guy, Nick Bostrom, a written word artist who also uses the same artist name, and I contacted him at the time to make sure he was cool with me using the same nick name. He replied in the positive and so I stuck with it. I even registered my nick name with one of them online artist registers and searched there too of course.


As it happens, I have since come across another musical band with the same name. I don't know how I missed that one. But if you google synkrotron you either get a million Swedish scientific pages, Nick Bostrom's page, or my music, so I'm sticking with it until someone complains in writing.






Sorry for that... back on topic ;-) 

Synkrotron, that was it.  Thanks very much!  I figured it was just a check box somewhere, and now I know.

Konrad, as tempting as Zorch is, I'm going to continue giving it some thought.  This is serious business, you know, so don't want to rush into something.  

Thanks again guys.