关于删除TREEVIEW里节点的问题

我创建了一个删除按钮，先在TREEVIEW里选中一项，按删除按钮，先用MSGBOX确认是否删除后，在数据库里删，我想在确认选中的项确实在数据库里被删除，然后在TREEVIEW里删节点，可是程序调不通 注：我上午把TreeView1.Nodes.Remove (TreeView1.SelectedItem.Key) 放在了第一个if语句里，结果总是出现超出索引边界的警告，所以只好把他放到了第一个if语句之外
Dim reply As Integer
Dim i As Integer
Dim con As New ADODB.Connection
Dim Rs As New ADODB.Recordset
Dim str As String
Dim str1 As String
Dim delete as boolean
delete=false
with treeview1
If .Nodes(i).Children > 0 Then
reply = MsgBox("该组内尚有子节点，确认删除吗？", vbOKCancel, "提示")
If reply = vbOK Then
con.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & "db1.mdb;Persist Security Info=False"
con.Open
str = "delete from report_table where zu= '" & TreeView1.SelectedItem.Text & "'"
con.Execute str
str1 = "select * from report_table"
Rs.Open str1, con, adOpenDynamic, adLockOptimisticmistic
Rs.MoveFirst
Rs.Find (report_table!zu = TreeView1.SelectedItem.Text)
If Rs.EOF Then
delete = True
End If
con.Close
End If
End If
Next
If delete Then
TreeView1.Nodes.Remove (TreeView1.SelectedItem.Key)
End If
End with