1 player not walking after fxb import

Hello everyone,
I have a problem with the player( third and first player) ,only after importing the model (fbx from rhino) the player does not walking anymore(in play mode) .Using the arrows or letter W/A/S/D of keys board do not work.
Till now I did not have any problems when I imported FBX files.
Can Some one give some tips to solve this problem?