I just changed the drive belt on my z4200. Now it won't go. Everything looks to be turninig well. The pulleys are not slipping. When I try to move forward or backward, nothing happens. Transmissions are engaged. It has small levers in the rear in case you want to push the mower. But they are where they are supposed to be. Checked fuses, they are OK. I am stumped. I joined this site today to get some help. Any suggestions would be greatly appreciated. I changed the belt after the other broke. I knew the old belt had a cut on it but waited till it failed. Running perfectly before that!!!???