IE automation: able to change dropdown list value but webpage doesn't update

[Sandstedt]

below code works fine for me

[vba]
IE.Document.getElementById("list").selectedIndex = 8
IE.Document.getElementById("list").FireEvent ("onchange")
[/vba]

That's great! I wonder why my code fails. The dropdown list changes value but the onchange-event doesn't trigger anything. Can you find any errors?

[VBA]
Sub UpdateList()
Dim IE As Object

lng_Sleep = 500

Set IE = CreateObject("InternetExplorer.Application")
IE.Visible = True
apiShowWindow IE.hwnd, SW_SHOWMINIMIZED
Sleep lng_Sleep
IE.navigate "https://www.avanzabank.se/aktier/lista"

Do
DoEvents
Sleep lng_Sleep
Loop While IE.ReadyState <> READYSTATE_COMPLETE

IE.Document.getElementById("list").selectedIndex = 8
IE.Document.getElementById("list").FireEvent ("onchange")
End Sub[/VBA]

I use IE9, if it's any help.