Ok, so I am new to this… unpacked it and assembled it per instructions. The moment I went to drive it off the metal crate, this happened to me. Left lever makes it beep and there is no forward or backwards movement. Blades engage so it’s not the switch under the seat. Anyone have any ideas to what this might be? I mean, I know it’s frustrating as F%*k but that’s about all I can gather at this point!! Any help?