2D Geometry Not Recognized Properly in Workbench
 

I am trying to create a 2D mesh using Ansys Meshing. My knowledge of Workbench is limited almost exclusively to 3D geometries. My geometry includes a thin obstruction that should be recognized as a hole. This hole is not being recognized, and all my meshes do not include this portion of the geometry.

I created the geometry using AutoCAD, and I've imported the geometry into Workbench as a .igs file.

I'd like to upload my two geometry files as a .zip, but the upload keeps failing. So, first, does anyone have any suggestions on how I can attach the geometry files?