Unable to create hex mesh on wing surface in ICEM
 

Hello guys, iam trying to create a hex mesh for 3D wing with inverse zimmerman planform having C shaped domain in ICEM. I followed a tutorial in creating a hex mesh around a wing. After pre-meshing it, the mesh is getting created everywhere except on the wing surface.
Please help me out with this guys.
(i have attached images of the model and the mesh and also the geometry file(.iges format) below)