Smooth mesh in maya good but in UE4 NO SOLUTION

hi unreal engine support
if I create a static mesh in maya 2013 or 2015 with smooth form is turn good in maya and good in the UE4
but if i create a skin smooth bind for this static mesh i mean joint (skeletal mesh) the smooth form is very good in maya when i press 3
but if I export in the UE4 4.6 never showing the smooth form !!! this problem is the same for the blend shape ( morph target)
give me a solution my friends

Hi yosrit,

Pressing 3 just gives you a Smooth Preview. Go to Modify>Convert>Smooth Preview to polyMesh as shown:

Then export mesh.

thank you for answer
this tool is helpful