Motion Blur / Redshift - TyMesher Slow Down

[2ma9zen]

Despite having read this thread and other threads, I'm still not nearer to getting motion blur with Tyflow, in 3DS Max with Redshift.
Its probably a minor thing, that one radio button I haven't set.
I have tried it with a simple flow, attached here, in the hope someone could make it work. I guess it's dead simple once you know 

All the best!
Thomas