Motion Blur Problem

[idtools]

Hi All

Maybe someone could help me, i try to use motion blur in simple animation with vray cam
but only the first image is calculated with motion blur, i try to test different range of image
but it's always the first image that is motion blurred.
i hopre that someone could help me.

[idtools]

it woks by using a movie cam and not a still cam.
sorry.