Hell, I had this threadmill for last 18 months. problem is on the running bourd right hand side front screw broken 2 time in 18 months. Why is same screw keep bracking. I replaced new screw yesturday. When i run the machine to test, soons you step on the belt, belt is stop and moter is still runing. What kind of adjustment it require. Do i need adjust the moter belt or running belt. Please require you help. Thanks. Jaskirat Gahunia