How to insert a new row in a "bindingsource"DataGridView row

Hi!
I've done a simple CRUD app for a specific table, using Entity Framework, with binding source/binding navigator. I have a form divided into two parts: one for the fields individually and the other with a "DataGridView". All is OK, except that I can't insert new records. I've beeing searching and searching and I couldn't found the answer. I suppose that this same problem will arise with the "delete"...
How does I insert a new row in a "bindingsource" datagrid? The first column 1 an Identity column.

Thank you very much in advance
A.Barros