Maybe this will help - here are all the instruments I used to use. This was in Sonar 6 on an old machine, where they worked fine. I have v6 installed on my current machine, but it won't register all these plugins.
 

 
 
 
 

Have you tried running SONAR as administrator? Some XP era plug-ins must be run as administrator in newer OSes. Of course, I have no idea what OS your old and new machine use. Whether you are coming from 32 or 64bit SONAR 6 to 32 or 64bit SONAR Professional might be good to know too.

Aha! Running Sonar 6 as admin picks up a bunch of those plugins. I believe they are VSTs.
And now, Sonar Pro 23, 64bit, picks them up too. I notice a substantial delay between keypress (MIDI) and sound. Any ideas there?
Sorry for the newb questions. I've barely touched Sonar and MIDI since 2009!

The delay the result of your audio setup. Depending on your audio interface this would be set in the in software provided by the interface manufacturer for dedicated DAW interfaces using an ASIO driver or the buffer size slider in SONAR Preferences > Audio > Driver Settings when using the other driver modes.

Also, list your specs like I have in my sig, so we can help diagnose your latency issue.

• Latency is fixed. I created a signature, though not sure if it will attach to this already created msg.
• Awaiting new installation keys from Native Instruments.
• Thanks, everyone!

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Funniest thing ever:

Glad you got it fixed.
 
Your sig says "funniest thing ever:" and that's it.  So if that's your sig it attached to your post (and it should attach it to all your post already on the forum.)

Whoops. The spam filter got it. Try this:
 
soundcloud dot com/user-237714155/sales-call-abyss