Haven't flown my Phantom 2 in probably 2 months. Went out today to fly it, started up fine, calibarated the compass, got my green lights and lifted off to about 10 feet. The Phantom will not hover and takes off slowly above towards me. It seems like I have no control over it but upon attempting to bring it down it crashes about 20 yards behind me. It almost seems to me like the controller is not functioning properly. I don't know, I'm new at this and have never had this problem before. I'm afraid to take it any higher than 10 feet, afraid I'll have a fly away. Even though I have the green lights that it's ready, it seems to be flying on it's own. I have the controller in GPS mode on switch 2. Anybody have any suggestions as to what the problem could be. Thanks for helping this newbie out!