Your climbing rose blooms on what is called "old wood". That means that this year's blooms will come out on last year's canes. When the canes don't survive winter, you won't get any blooms. The reason you had that one season's blooms so low on the plant is because the canes winterkilled back to that point. It's terribly frustrating to have a climbing rose blooming knee-high, isn't it? I know just how you feel! Provide as much winter protection for the canes as you can. I've had good luck by pulling the canes from their support (the arbor or gazebo or whatever they're climbing on), bundling them together, and wrapping them in burlap. I also mound soil and mulch around the base to protect the crown.