Insert a new row in a "bindingsource" DataGridView

Hi!
I've made a small CRUD app to a specific table, using Entity Framework 6.0 and "Binding source/Binding Navigator". The Windows Form is divided into two parts: one for individually fields and the other with a DataGridView, all connected. All seemed OK, but when I want to insert new records this is impossible because the fields aren't initialized and Errors occur.
I've tried, I've searching several hours and I couldn't found an answer. 
Does anyone knows how to do it?


Thank you very much in advance
A.Barros