I have a LTX 1046 the reverse safety switch light will go on when the key is turned on and the engine is not running but when the engine is running the light will not go on there for every time I back up while mowing the blades dis-engage and I need to turn my PTO switch off and back on again to continue mowing. This is a real hassle because you don't realize how many times you back up until this feature doesn't work. Anyone have any ideas what could be wrong ?