It appears that my vertical control has failed. Upon start up, the camera comes to attention and maintain a 90 degree angle. Within seconds, it falls and point down. I read that this might be a control adjustment. I have never been able to access computer programing on this copter since I became the owner. Any suggestions please? Thank you

It appears that my vertical control has failed. Upon start up, the camera comes to attention and maintain a 90 degree angle. Within seconds, it falls and point down. I read that this might be a control adjustment. I have never been able to access computer programing on this copter since I became the owner. Any suggestions please? Thank you