I purchased my treadmill in 2004 & it was used for about 10 hours. Then it made a beautiful clothes rack until l started using it again last year. It worked fine, then last week, I put the plastic key in and nothing happened. I tested the plug in receptacle and that had power. Help, please. I am 74 years old & need the exercise. I cannot afford a new treadmill because I live on $634.00 a month social security. Thank you. Helen Bullard email: peytonbullard@bellsouth.net