I have used the lattice vectors under &CELL_PARAMETERS in the scf file
these lattice vectors were calculated using v1 = (a,0,0), v2 = (0,b,0), v3 = (c*cos(beta),0,c*sin(beta)) equation
&CELL_PARAMETERS
17.039 0.0 0.0
0.0 13.096 0.0
0.0 0.0 12.017
I am not sure i defined it in the right in scf file! THANKS