The model does not appear after I click on Export button ( Inventor's Plugin)

The model does not appear after I click on Export button ( Inventor's Plugin)

If you manage to install the plugin and it appears in the menu but it does not export any models, please follow the steps below:
  1. From Inventor menu choose export
  2. From the list choose  Export to DWF
  3. Make sure that the first 4 are checked ,while the two below are not ( Please see picture below)