You should ask the manufacturer of the product:
http://www.fotodioxpro.com/lens-mount-adapters/mirrorless-dslr/fujifilm-x-mount-system-lens-adapters/fotodiox-lens-mount-adapter-nikon-g-type-and-dx-type-lens-to-fujifilm-x-mount-camera-adapter-fits-fuji-x-pro1-mirrorless-cameras.html
...
I purchased the Fotodiox lens mount adapter to use Nikon G type/DX type lenses with the Fujifilm X-pro1 body, and although all the attachments fit properly I cannot physically take a photo! When I press the shutter button nothing happens - as if there is no lens attached.
At first a warning came up about the shutter speed being too long but I made adjustments and still no luck.
Can anybody help me with this? I haven't come across anybody having this sort of problem before - and I don't know if I am making a really basic technical error (I am still fairly amateur) or what the problem could be. I assumed that because everything fit together fine I should be able to take pictures fine.

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