STEVAL Drone-02 not Lifting but spins around itself Yaw motion around its own axis

[aa7]

We have 2 nos of STEVAL Drone 02. 1)We assembled correctly the motors CW & CCW 2) Propellers are also correctly assembled. We are using STBLE Drone androidapp. We are facing same problem for both the units.

Propellers rotates in proper direction  but its not lifting up.instead it lifts slightly 25 cm above ground & then starts rotating around itself & moves horizontally uncontrolled. Then we have to stop it.

VIDEO of Drone behaviour attached.

Please suggest 

Regards

Shirish

[Javier1]

i wouldnt call that lifting to 25cm, i have no idea about the product itself but this looks like a shy liftoff, if the drone is not in the air it cannot balance itself

[aa7]

Thanks. This is STEVAL- Drone02 . This must be tested software and frame
kit components from ST MICRO.
Please suggest who is the right person from STEVAL DRONE team to contact
for specific questions.
Thanks and regards
Shirish