Please help my Update doesn't want to work!!

[Nessa]

updateAdapter.U pdateCommand = new OleDbCommand("U PDATE DoBEDetails SET NoD=@NoD,Projec tName=@ProjectN ame WHERE ClientID =@ClientID", dbConn);

updateAdapter.U pdateCommand.Pa rameters.AddWit hValue("@Client ID", OleDbType.Integ er).Value = txtID.Text;
updateAdapter.U pdateCommand.Pa rameters.Add("@ NoD", OleDbType.VarCh ar).Value = txtNoD.Text;
updateAdapter.U pdateCommand.Pa rameters.Add("@ ProjectName", OleDbType.VarCh ar).Value = txtPro.Text;

dbConn.Open();
updateAdapter.U pdateCommand.Ex ecuteNonQuery() ;
dbConn.Close();

dbConn.Open();
updateAdapter.U pdateCommand.Ex ecuteNonQuery() ;
dbConn.Close();