Hi, Went for my first flight today. I brought the quick start guide with me and followed it. on Step 6: calibrating the compass I followed the steps, the indicators were solid yellow, so I rotate horizontally and get the solid green. I followed this with doing it vertically. After 360 degrees the light turns off and flashes green. I take off and I notice it is hovering, but seems to be "drifting" quite a bit. I land and double check the procedure, recalibrate and have exactly the same results. I decide to take the phantom home. I watch a youtube video in which they demonstrate calibrating with the front down(not mentioned in the quick start). I tried calibrating with this method. The horizontal turned from yellow to green as expected. When I did the vertical I get flashing red lights. Did it again with the same results --- Not sure what to do?