Setting Unit Scale in 3dsMax has no affect on imported meshes

I’ve recently setup a new computer and have reinstalled 3DS max and UDK.

For some reason changing the unit scale in 3dsMax doesn’t affect the scale of the meshes when I import them into UDK:

This use to work fine before. Does anyone know of some setting I may be missing, so that adjusting the unit scale in 3ds max affects the scale of the meshes I’m importing into UDK? Because at the moment, whatever I set the unit scale to in 3dsMax, the meshes are always the same size when I import them into UDK.

Thanks in advance.