I am faily new to the Phantom. I have read all the documentation several times, watched all the DJI videos, and it has gone pretty well... until today. This morning, after the initialization, and acquiring 6 or more GPS satelites, I took off in GPS mode. A few seconds later, I lost control. It crashed into my roof and went in a random direction. I realized that I could still control the altitude, just not the direction. I made a hard landing to avoid hitting something (like a neighbors house). This evening, after replacing the batteries in the transmitter and re-calibrating the compass, just to be safe, I tried it again, but only went up a took it up 5 feet or so. Again, I didnt seem to have control and it hit the side of my house (broke a prop). Anybody have any idea what I need to do to fix this? Thanks in advance for any help.