How to fix this problem on my Proform 515TR?

hello,

I just buy a Proform 515TR (PFTL497707.0) Treadmill last Dec 22, 2007 at CHRIS SPORTS, Philippines and i used it every day for 30mins.My Treadmill problem start last Feb 6, 2008. When i doing my Morning workout with the treadmill i accidentally i pulls the safety key and automatically the system shut down when i put on the safety key again the console light up then shut down and the incline motor starts doing incline and do the decline mode which i cannot control. I immediately pull the safety key and shut off the main switch then after a while i switch on again the main switch and put on the safety key again the Incline motor starts to incline and its locks the only display i saw in the console is the led bar on the calories and heartbeat. But i can do the DEMO mode by pressing the stop botton and switch on the main switch . Please HELP


Thanks and more power!!