Went out to fire the mower this week and ran into a issue. The mower starts,and runs like a top, until i release the parking brake. Then it dies. Has a hydrostatic drive system which is in nuetral. The brake switch seems to work as it dies when released. The blade switch also seems to be good as it dies when blades are engaged. I removed the seat switch and pressed it with my finger as iwas releasing the brake with no luck. Am i checking the switch wrong or is this A sign that the switch is bad? Thanks !