Forms Data Controls :: Finding Control In Datalist?

I cannot dig out the controls correctly in my code, as they are hidden in a datalist. I am trying to update some data into a row in the 'resume' table. Is INSERT INTO corrent for updating data which is already there?

and also i cannot find the controls in the datalist correctly....?

protected void LinkButton2_Click(object sender, EventArgs e)
{
string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
System.Data.SqlClient.SqlConnection sqlConnection1 =
new System.Data.SqlClient.SqlConnection(connectionString);
System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand();
cmd.CommandType = System.Data.CommandType.Text;
cmd.CommandText = "INSERT INTO resume (confirmed,comment,reference) VALUES (@confirmed,@comment,@reference) WHERE number = @number";
cmd.Parameters.AddWithValue("@number", DataList1.FindControl("picturesLabel0").Text);
cmd.Parameters.AddWithValue("@confirmed", DataList1.FindControl ("RadioButton1").SelectedValue);
cmd.Parameters.AddWithValue("@comment", DataList1.FindControl ("TextBox3").Text);
cmd.Parameters.AddWithValue("@reference", DataList1.FindControl ("TextBox4").Text);
cmd.Connection = sqlConnection1;
sqlConnection1.Open();
cmd.ExecuteNonQuery();
sqlConnection1.Close();