C# - List View And Inside Listview Like Nested

i have list view and inside lisetview i have another list vie like nested listview
lv1 --> lv2 and inside lv2 i have button when i'll click buttion than insert template show but how can fine control lv2 ....? there is my code Lv1 is working but lv2 is creating problem..?

protected void lv1_ItemCommand(object sender, ListViewCommandEventArgs e)
{
if (e.CommandName == "NewRecord")
{
lv1.InsertItemPosition = InsertItemPosition.FirstItem;
}
}
protected void lv2_ItemCommand(object sender, ListViewCommandEventArgs e)
{
if (e.CommandName == "NewRecord")
{
//ListView lv2 = (ListView)e.Item.FindControl("lv2");
//lv2.InsertItemPosition = InsertItemPosition.FirstItem;
}
}