align stroke option grey out

[duceduc]

Hi guys. I have another issue and am and not sure what I am doing wrong. I've enclosed the file for another who wants to take a look at what I did so far. In this file, I have created two simple shapes(shown on the bottom of the layer panel) and used the 3d extrude and bevel to create my 3d shape. After which, I expand and delete the clipping mask and unite the inner circle. Ungroup so all I have left is just two shapes. Now I want to apply a 5pt stroke to the outer circle and align inside, but the option is grey out.

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