Doesn't update my database

Hi everyone, the code below still doesn't update my database //Fill a dataset with values CSOAIS.BACKEND.DATASETS.ItemDatasetTableAdapters.ItemTableAdapter ItemAdapter; ItemAdapter = new CSOAIS.BACKEND.DATASETS.ItemDatasetTableAdapters.ItemTableAdapter(); CSOAIS.BACKEND.DATASETS.ItemDataset ItemDS = new CSOAIS.BACKEND.DATASETS.ItemDataset(); ItemDS.DataSetName = "ItemDataset"; ItemDS.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema; ItemAdapter.Fill(ItemDS.Item); //Auto generate item code txtIcode.Text = this.GenerateCode(ItemDS.Item, "ITM-"); // Create a new row. CSOAIS.BACKEND.DATASETS.ItemDataset.ItemRow NewItemRow; NewItemRow = ItemDS.Item.NewItemRow(); NewItemRow.ItemCode = this.GenerateCode(ItemDS.Item, "ITM-"); NewItemRow.ItemName = this.txtIname.Text; NewItemRow.ItemDesc = this.txtIdesc.Text; NewItemRow.CategoryCode = (string)this.cmboCategory.Text; NewItemRow.SubCategoryCode = (string)this.cmboSubCat.Text; NewItemRow.UnitMeasureCode = (string)this.cmboUM.Text; //set default values NewItemRow.LocationCode = "CSO"; NewItemRow.StatusCode = "Active"; // Add the row to the Item table ItemDS.Item.Rows.Add(NewItemRow); // Save the new row to the database this.itemTableAdapter.Update(ItemDS.Item); this.itemTableAdapter.Connection.Close();