At 16:45 central time, the pilot of a Piper PA46-500TP lost control while landing at Rockwall Municipal Airport. The pilot and two passengers were not injured. The pilot said the airplane veered to the right after touchdown on runway 17. Rudder control inputs were ineffective and the airplane continued off the right side of the runway. The pilot aborted the landing and added full power, at which point the airplane turned back toward the runway. It struck a light on the end of the runway and continued across a road, striking a fence and a tree. An examination of the nose landing gear assembly revealed that the support structure was separated from the hydraulic actuator.