Greetings All!
 
I used Sonar Producer 3 for many years but at one point my computer got corrupted and Sonar stopped working.  I just reinstalled Sonar Producer 3 along with the drivers for SPS-25 USB device but I don't seem to be getting any Midi communication.  Same keyboard is hooked up the same way to the SPS-25 and I followed all the directions to the driver uninstall/reinstall.   When I bring up the Midi mapper it says there are no Midi input devices and when I play keyboard on a Midi track that is recording I get nothing.  Also..when I bring up a track and play the notes via Mouse I'm not hearing anything (probably a separate issue).   Any tips for an old Sonar "rookie" would be incredibly appreciated - Thanks!!   ~Vincent James  

So you're saying that under MIDI Devices nothing is displayed?
https://www.cakewalk.com/Documentation?product=SONAR%20X3&language=3&help=Dialogs2.057.html
 
If so, is the device being recognized at a Windows level under Device Manager?  I think it should display under Sound, Video and Game Controllers: 
http://www.computerhope.com/issues/ch000833.htm
 
Also, you mentioned MIDI Mapper, but its relevance seems to be tied into the version of Windows in use:
http://coolsoft.altervista.org/en/blog/2013/03/what-happened-midi-mapper-windows-8