This is happened, probably, because you don't have a "D:" partition in your hard drive. For all of the new CAVS JB-199 software upgrades the "D:" partition is REQUIRED. Path to the folder with the songs chould be: "D:\Songs". Check is it present or not before upgrading. If you maked a software upgrade and you see the error, related with "D:" partition, or just your songs are not recognized by JB-199, you have two choises:

1. Create a "D:" partition. (Preferred.) This video can help you: http://www.youtube.com/watch?v=wZYzKYFo8K0

2. You can restore the previous version of the software. Run the software upgrade file again, but instead of clicking "Upgrade", click on "Restore" in the left top corner. You will see the open file window. In that window you will see all the backed up versions of the JB-199 software. Choose the earliest version and wait till it will be restored.