brightness contrast problem

hi, I am new user of V-Ray and I am not able to get the brightness /contrast with vray with standard directional light (with v-ray shadows)which I get using single standard directional light with scanline renderer (ray traced shadows). I think the skylight is washing out contrast . What is the solution. :?

Also I want to know whether we can use photometric lights(like IES Sun),and exposure controls in VRay :?:

Make sure you’ve set the max environment to “No exposure control” and that the default lights are unchecked in the Vray global settings.