Hi Angie,
I just want to confirm a few things. First, you would have needed to create the custom questions field to your Contacts table. When you perform the import, make sure that the field name matches the one in the table. Lastly, you'll need to make sure that the Screen and/or Grid is updated to include that table's custom field so it can be viewed.
Have you followed these steps already? If you have verified that your screen/grid has the field included, are they simply empty for the records you imported?
-Angelo