Combo Box From Table -- No Data Just Headers

I can't get my choices to display--only the Headers. In the selected field I choose combo box and choose the table to look up in the row source. The data columns are first in the table and their ID is last, but I only get the Header to display in the box. If I deselect header, I get an emply list

There are actually 7 columns in the look up table (the eighth is the ID) and 10 rows of possible choices.

Column Count: 7
Headers: Yes (or no doesn't matter)
Bound Column: 1 (changing doesn't matter)
Limit to List: No (so I can add)

What am I missing in the properties setting?

Also, can I use one of the columns in the look up table as a primary sort on a report? Or will it see the whole string of columns as one?

Thanks.