[LAU] M-Audio 88es Keyboard

Hi List, This probably isnt the right place, but I'm kind of lost on where to go from here: I have an M-Audio Keystation 88es Keyboard. I plug it into my laptop running KxStudio through USB, and pretty much works perfectly out of the box. I've had a lot of success running it into LinuxSampler and running that into Ardour. I pretty much only feel limited by the sample library I have there. That and XRuns. I'm still working on reducing those. If I increase my buffer size in Jack, the keyboard isn't quite as responsive (probably obvious there). I figure I'll eventually find the sweet spot... What I do hope someone can help me with is a simple problem. When I plug a foot pedal into the sustain port of the keyboard, it doesn't add any change to the signal. The only other experience I have is using this keyboard with Logic, Garageband, and Main Stage. The sustain worked like a sustain would in these programs. I wonder if someone could point me towards unlocking this functionality. Google searches aren't too helpful with this. Thanks! Clifford Dunn Flutist/Composer http://www.myspace.com/clifforddunn http://www.youtube.com/user/beatleboy07 https://www.soundcloud.com/clifford-dunn