Già provato con questo fix ?
sito Korg UK
1. Download the file and unzip it to any location.
2. Double-click "V111fix.exe" (for Windows 7 32-bit edition) or "V111fix64.exe" (for Windows 7 64-bit edition)
3. Click [Execute]. (This may take a little while to process)
4. Click [Close] when the process has completed.
5. Install DrvTools 1.12 for KORG USB-MIDI Driver V1.12.