the back pain you are experiencing may have nothing to do with your scoliosis but may have everything to do with problems in your lower back. i would suggest that you see a good back specialist (orthopedist) for a thorough examination.
i have scoliosis and now suffer from right side lower back/upper leg pain after long physical labor. i was diagnosed in high school with scoliosis but it wasn't severe enough to have a brace made or surgery done. i do have an obvious unbalance as one hip is higher than the other. i recently got a well-paying job with great benefits but it is very physical. i lift light to moderately heavy boxes while walking long distances for 11 sometimes up to 13 hours and half way through each day i start to experience pain in my lower back and it travels down my right leg when i put weight on it.