I have SEVERE Casio Data Editor problems. It connected to my PX-5s only few times and than stopped. Displays "Communication Error" message. Wether I use Preferences/"Auto search" or go manuallty to "Casio USB-MIDI" I have Win7-64, I7-920 CPU, 12 Gig Ram. My "Sonar" SW sends PG## to PX-5s without any problems.