Topic: Can't play chords and release keys

Hi. I have a huge problem with my Casio ToneBank Ct-670 connected to pc using a midi-usb cable. When i press a key, I can hear sound, but when i release the key, the sound doesn't mute. On the program screen, the key is still pressed. A little diode on my midi-usb cable lights when i press any key, and when i release it lights too, so it should work fine. Another problem is.. when i play more than 1 key at the same time, only one, first note is played in Pianoteq. Diode lights correctly, even when i press 10 keys and release one of them, or press another one at the same time, diode lights. I hope you guys help me with that.