PIxhawk 2.4.8 Chinese Clone Yaw Drifting

Hello, I would like to ask from you experts please if you have any idea what am I missing? Already completed the calibration process, but upon throttle up my drone is drifting wont steady on hover. Also, the pitch of my Flysky Fsi6 is i think not responding. Please help. The light LED of pixhawk is YELLOW.

Sounds like your drone could use some tuning. Below is a link to the most excellent new Tuning Process Instructions page by @leonardthall