Rendering Sequence

I am all set to render an animation of 100 frames through 'Solidrocks'. But as soon as i click the render button, my selection of 'Active Time Segment' jumps to Single frame (in the TIME OUTPUT Dailogue in Render Setup). This is also true if i select a Range of frames.
What could be the problem ?
What am I doing wrong ?
I have never faced this in the earlier versions of Soildrocks.

Solution appreciated in advance

Thanks !!

3dsMAX 2016
VRay 3.20.03
SR 1.9.5

Hi Dear,

I am still stuck on the same issue as before.
Still waiting, Nothing from your side from a long time ???

Kind Regards,