Hey Saad,
It sounds like you have your props placed incorrectly. There are two clockwise and two counter-clockwise motors which, in turn, use clockwise and counter-clockwise propellers.
If look closely at your quad, the ends of the motor arms are labeled either "A" or "B":
[image|602203]
Similarly, each propeller should also be labeled "A" or "B." Try swapping props so their letters match their arms and you should be good to go!