White Riding Lawnmower Won't Start?

I have a White riding lawnmower with a 20hp Briggs motor. I was getting it ready for grass cutting season. I charged the battery and it fired right up. So I loaded it on my trailer and brought it home, about a 20 minute drive. When I got home and went to start it, it didn't make a sound, I checked to make sure pto was off, I tried boosting it and still no sound. I removed battery and cleaned the posts and made sure everything was tight.

By Chris