Hi Clay,
The SQL DC is the main connection, and the fields are added to the SQL table and we are pulling them from the main data source onto the form.
This was an old form, and it had two stages. Stage two needed additional fields, so we re-opened the form and first added the new fields from SQL and then dragged them onto the form. When the form was published to a SharePoint library and then accessed, we were unable to enter data in the new field. However, if we dragged an old field onto the form that was not used before, we were able to populate it with data. Thanks for a quick response. Any assistance appreciated.