Hi looking for help with my 2016 ZT Elite 60" I was mowing yesterday and my blade belt came off I turned off the mower to see what happened. When I got back on the mower it starts just fine but when I disengage the parking break the mower shuts off. Could this be a Safety switch problem? I have not replace the blade belt as the mower stopped in a difficult area to work on it. Does the belt need to be in place for the mower to run? Any help would be greatly appreciated.