Help! Got a phantom 1 as a bday gift. Tried it out today. First had difficulty in take off then was able to figure it out. Finally able to take it off but it wobbles in mid air and then crashes. Don't know what to do. Calibrated imu and compass. Check propellers, everthing looked good. Trying to upload a video but not the correct extension so still trying to find out how to succesfully upload it. Hope someone can help me with this. Thanks.