Threading app still not responding

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VB

threads

Hi Im new with Threading and I have a Thread that Execute a Query "SELECT" When debuging the codes I've notice that on my DataReader it takes time to finish the Execution.

On My Button.Click event

Dim LoadQuery As New Thread(AddressOf LoadToListView)
LoadQuery.IsBackground = True
LoadQuery.Start()

Ok I've change From Textbox to Listview so that 400 records will be shown

My LoadToListView Sub

Using DataRead As SqlClient.qlDataReader = cmd.ExecuteReader
If InvokeRequired Then
    Me.Invoke(New DelegateSub(AddressOf LoadToListView)
Else
    If DataRead.HasRows Then
        While DataRead.Read
            ListView2.Items.Add(Trim(DataRead(0).ToString))
            ListView2.Items(ListView2.Items.Count - 1).SubItems.Add(Trim(DataRead(1).ToString))
            ListView2.Items(ListView2.Items.Count - 1).SubItems.Add(Trim(DataRead(2).ToString))
        End While
    Else
        MsgBox("No Data found", MsgBoxStyle.Exclamation, Me.Text)
        DataRead.Close()
        Exit Sub
    End If
End If
DataRead.Close()
End Using

1. It take 3-5 Mins for the DataReader to Execute the Command can anybody explain it to me?
2. The UI freeze even I've used threading, Do I need to use background worker or It's fine without it.
3. What are the factors that make the DataReader Reads fast ?
4. What makes it slow?

on my MS SQL the Query runs fine it only take 11Sec to Query 400 Records with 4 fields

Hope you can Enlighten me with Threadings