follow the steps,( After all the motor directions, props etc are correct )
1) Place the quad in level surface, Means pitch and roll angle should be zero, If not calibrate Accelerometer, (placing stationary in level surface.)
2) enter the receiver test menu, Here you can see the Interpreted value from each receiver channels.
3) Hold the elevator stick to down, the value against elevator should be b/w -100 to -90, If it is higher (>-90) or Lower (-100) Then change your elevator channel lower end position (in Tx) to adjust this to the needed range. Also while you move the elevator stick to down, 'Back' should be displayed against this channel (in LCD), If it is displayed 'Front' Instead of Back, Just reverse your elevator channel.
Now Move elevator stick to High end, and change endpoints to adjust max. value in bet ween 90 - 100 range. (Also it should display Front against this value) .
Now the configuration for your elevator channel is completed
4) Follow the above step for Aileron(Roll) and Rudder (Yaw) channels , But in this case it will be displayed Left or Right according to stick movement instead of front or back as for the elevator channel. Also adjust the min, and max. stick values to fit in the same range as set in elevator. Reverse the required channels.
5) Now for throttle channel the min. stick value should be higher than -90 and max. value less than +90 . On throttle max, it should display 'full'.
6) Now your accelerometer and receiver are calibrated and set up.
7) Apply 20 - 30 % throttle, quad should not lift from ground .
8 ) Move elevator stick a little forward, back motors should speed up, and hence quad starts tilting to f/w , on moving elevator b/w , the quad should tilt b/w .
9) Check aileron and rudder channels also in this way.
10) Now every thing is fine and LIFT OFF to the skies, try to hover at one place and apply necessary trims to make it stable.
Take your time - follow every steps , If you don't understand any thing, Feel free to ask out before breaking any props
Happy landing