subgrid blank add form?

Due to phpGrid internal function call sequence, the enable_edit() should always be called BEFORE set_subgrid() method, or edit properties will be ignored, or you will see a blank add record form similar to above.
CORRECT:
$sg = new C_DataGrid("SELECT * FROM suppliers","supplierCode","suppliers");$sg->enable_edit('INLINE', 'CRUD');//supplier detail2: products$sg_d2 = new C_DataGrid("SELECT * FROM products","productCode","products");$sg_d2->enable_edit('INLINE', 'CRUD');//set detail 2 for suppliers$sg->set_subgrid($sg_d2, 'supplierZip');$sg->display();WRONG!!!:
$sg = new C_DataGrid("SELECT * FROM suppliers","supplierCode","suppliers");//supplier detail2: products$sg_d2 = new C_DataGrid("SELECT * FROM products","productCode","products");//set detail 2 for suppliers$sg->set_subgrid($sg_d2, 'supplierZip');$sg->enable_edit('INLINE', 'CRUD');$sg_d2->enable_edit('INLINE', 'CRUD');$sg->display();