Help on Rails

In the beginning of the season I learned rails which is huge for me. I could do them consistently but not confidently. I was working up to trying a sausage rail but attempting a short round rail. It was a rail I had to pop on which was different for me and I wiped out my first few times which is expected. I couldn't get it down. I took a month long break due to school. When I went again and tried rails all I did was lean back and land hard on my hop every time. I can't control it, I just lean back. What should I do? I send it but I can never actually do them.