importing c-grid into Gambit

Sunil

Hi, I have an airfoil grid. Its a c-grid. I created a neutral file and imported it into Gambit. After some modifications, when I export the mesh for fluent, I cannot seem to get rid of the inner edge of the c-grid which basically forms the airfoil and the wake. I would appreciate if anybody could suggest ways to export this c-grid so that the wake center edge would not be exported as a wall.

Thanks