Master Detail grid with typed dataset.

I have read a lot of article which explain the Master Detail DatagirdView which is from two tables(Customer and CustomerOrder) . But mine is a bit complicate, hope someone can help!

I have a Typed Dataset(Dataset1), which is from two store procedures(GetBrokerFirm, GetBroker).

I am also using the Application Blocks(SqlHelper)

Master Grid should show data from GetBrokerFirm.

Detail Grid should show data from GetBroker.

I have two issues.

1) Detailgrid show all the data instead of Mastergrid related data.

2) Detail grid is not refresh, when I select the Mastergrid.

Here is my code.

//private variable

private DataSet1 _ds1 = new DataSet1();

private void Form3_Load(object sender, EventArgs e)

SqlParameter[] arParms = new SqlParameter[3];

arParms[0] = new SqlParameter("@FirstName", SqlDbType.VarChar, 50);

arParms[1] = new SqlParameter("@LastName", SqlDbType.VarChar, 50);

arParms[2] = new SqlParameter("@Company", SqlDbType.VarChar, 50);

//Fill the private dataset _ds

SqlHelper.FillDataset("Server=localhost;DataBase=LADS;Integrated Security=SSPI", "GetBrokerFirm", _ds1, new string[] { "BrokerFirm" }, arParms);

SqlHelper.FillDataset("Server=localhost;DataBase=LADS;Integrated Security=SSPI", "GetBroker", _ds1, new string[] { "Broker" }, arParms);

//add datarelation

DataRelation relation = new DataRelation("BrokerFirmBroker",ds1.Tables["BrokerFirm"].Columns["BrokerFirmID"], ds1.Tables["Broker"].Columns["BrokerFirmID"]);

//fill the datagrid

dgrdMaster.DataSource = _ds1.Tables["BrokerFirm"].DefaultView;

dgrdDetail.DataSource = _ds1.Tables["Broker"].DefaultView;