Flow behavior of the driven two-dimensional vortex lattice is numerically s
tudied with different densities of randomly distributed pointlike pinning c
enters. Different features in the curves of velocity-force dependence are f
ound between the elastic and plastic regimes. Scaling fit between force and
velocity above the critical driving force can be obtained in the elastic r
egime but fails in the plastic regime. Transition from the elastic to plast
ic regimes is accompanied by maximum peaks in the differential curves of ve
locity-force dependence in the disordered vortex lattice.