thanks Arcaxis... I have that same owners manual , I've read that page many times over these past few days trying to figure out the problem. I've also checked and re-checked that I'm plugging into the correct jack .... all is good there.....still no sustain. However, I 'm thinking that the problem might be related to the jack.... a loose jack, soldered connection may have broken. I'm taking it to be checked. If that isn't the problem it may be a software problem and that is when things can get expensive for a 11 year old keyboard.... Any other thoughts or ideas would be most welcomed.