Hyundai Verna Fluidic — Gear Not working

Address: Bangalore, Karnataka

Hi, I purchased new Hyundai Verna Fluidic in July 2011 in Bangalore Outer Ring Road show room, single handedly driven with care and smooth and also serviced regularly at Hyundai genuine authorized dealers. My car has run 40, 000 KMs so far and now I am facing a problem with my car so early. When the engine is ON and when I try to put the gear and I am not able to change the gear. Gear transmission is not moving and stuck. However if I switch OFF the engine then Gear is working fine. What kind of vehicle is this? just within 4 years and just 40000 kms this is happened. What kind of quality cars you are manufacturing, very bad. Please let me know what could be the problem with this.