Transmission Gear Indicator problems of the 2004 Jeep Grand Cherokee

5/25/05 the Jeep was parked in the driveway and running without the emergency brake on, with the boys inside. We were hurrying them to school. The weather was clear and dry. I ran back into the house, which took less than 3 minutes, to get betsy to hurry up. When I was heading back to the car the boys were yelling . The car was rolling backwards and rolled into the brick retaining wall around the driveway. When I got to the car the gear shift was slightly out of park. Over $1500 in damage was done to the car. A claim was filed with insurance company. I assumed the fault was mine due to being in a hurry. 1/17/06 I was moving cars around the driveway and had the Jeep parked in the driveway. The engine was running, the car was in park with the emergency brake on. The weather was clear and dry. I had the driver's door open, because I was only going into the garage for a second. I happened to turn towards the Jeep and noticed that it was rolling backwards. I ran to the Jeep, intending to stop it by putting the emergency brake on. When I jumped into the Jeep I looked down and noticed that the brake was already on, and that the car appeared to be fully in park. I was able to stop the car by putting my foot on the brake, with no damage to the car this time. I called daimler Chrysler that afternoon to tell them of my story. I was told that someone would be contacting me soon to look at the car, and not to have any work done on the vehicle before the person was able to look at the Jeep. 1/18/06 mr. W contacted me to meet to look at the car. 1/19/06 met mr. W at berglund Jeep at noon; he spent one hour looking the car over. He said that he was not allowed to tell me anything , and that Chrysler would be contacting me. He did state to me that I should keep the emergency brake on the car, and to take the key out of the ignition.