context menu on selected listiew items in vb.net

I am using a listview control and trying to achieve a context menu on the item being selected. But the menu is appearing in the blank area of the form....

here is my code...

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.Controls.Add(lv)
        lv.View = View.Details
        lv.Dock = DockStyle.Fill
        il.ColorDepth = ColorDepth.Depth32Bit
        lv.SmallImageList = il
        lv.Columns.Add("Button Text", 300, HorizontalAlignment.Left)
        lv.Columns.Add("PID", 50, HorizontalAlignment.Left)
        lv.Columns.Add("Process Path", 600, HorizontalAlignment.Left)
        Dim things As List(Of TrayButton) = TrayHelper.Tray.GetTrayButtons()
        For Each b As TrayButton In things
            If b.Icon IsNot Nothing Then
                il.Images.Add(b.TrayIndex.ToString, b.Icon)
            Else
                ' When we can't find an icon, the listview will display this form's one.
                ' You could try to grab the icon from the process path I suppose. 
                il.Images.Add(b.TrayIndex.ToString, Me.Icon)
            End If
            Dim lvi As New ListViewItem(b.Text)
            lvi.SubItems.Add(b.ProcessIdentifier.ToString)
            lvi.SubItems.Add(b.ProcessPath)
            lvi.ImageKey = b.TrayIndex.ToString
            lv.Items.Add(lvi)
        Next

        Dim mnuContextMenu As New ContextMenu()
        lv.ContextMenu = mnuContextMenu
        Dim mnuItemHide As New MenuItem()
        Dim mnuItemExit As New MenuItem()
        mnuItemHide.Text = "&Hide"
        mnuItemExit.Text = "&Exit"
        mnuContextMenu.MenuItems.Add(mnuItemHide)
        mnuContextMenu.MenuItems.Add(mnuItemExit)
    End Sub