I have a Casio WK-3100 which works fine. I purchased an M-Audio Keystation 49e midi controller to use as a second keyboard to play tones on the other WK-3100 channels. This actually works well with one exception. Sometimes when playing a note or chord on the M-Audion 49e, the note starts properly, but stop sounding within a second or two, even though I am still holding down the keys. The only connection is the M-Audion midi out to the WK-3100 midi in. Any ideas how to fix this???

John