VBA Automate IE: element.click and element.FireEvent (OnClick) Not working - vba

Question

I am trying to parse a web based pivot table.
Unfortunately, I need to expand additional lines in the web based pivot table in order to access all the data I need. I think that when I click on the + sign to expand additional lines, a script downloads the additional data from the database.
Anyway, here is the html code of the + sign:
<DIV class="clip9x9 di-img" onclick=_Ewa.Gim.tpdfce(event);>
<INPUT title=Expand class=ewaboot_expand type=image alt=Expand src="http://...">
</DIV>
I manage to get the correct element into an variable using IE.document.getElementsByTagName("Div") and a If Loop (for some reason the GetElementByClassName would crash my IE), but none of the .Click or .FireEvent (OnClick) methods works. I also tried both methods on the Input element below the DIV, and these are not working either.
Here is the code
Sub Test()
Dim IE As InternetExplorer
Dim div As Variant
Dim Obj As Variant
Dim WebUrl As String
WebUrl = "http://..../filename.aspx"
Set IE = New InternetExplorerMedium
Sleep 1000
IE.Visible = True
IE.navigate WebUrl
Do While IE.Busy Or IE.readyState <> READYSTATE_COMPLETE
Sleep 1000
Loop
Set div = IE.document.getElementsByTagName("Div")
For Each Obj In div
If Obj.className = "clip9x9 di-img" Then
Obj.Click
Obj.FireEvent ("OnClick")
End If
Next i
End Sub
When I look at the onclick attribute of my Obj element in th Spy Window (VBA editor), the onclick property has a + sign aside, and when inspecting inside it, no variable is attributed to it. I find it weird since the HTML code indicates a value =”_Ewa.Gim.tpdfce(event);” which I believe refers to the script that expands the pivot table line.
Any help would be much appreciated