khpro audio problem-music choppy

[Vi Harris]

Thanks George, but, no new hard drive, motherboard, etc. since last week. The problem arose after I purchased the KHPro upgrade on Oct 30.
I clicked on the .exe for each (Microstudio, Keyrite, Vogone), but the minute I did, I got the message "serial number and registration don't match. Please reinstall and try again". Well, duh! That's what I'm trying to do by opening the .exe file! I received a new registration number for KHPro Upgrade and used it. But each piece has a separate registration code. I just can't fathom how one could affect the other. I'll try contacting MTU. Thank you again for trying to help.