Cannot open a pdf to a page via vba

[tmd63]

I have code to open a pdf at a page.
But it doesn't work on my home PC. The opening line is :
file:///G:/Electronics%20Magazines/Practical-Electronics/Practical-Electronics-1968/Practical-Electronics-1968-01.pdf#page=18

But it doesn't open at page 18. It only opens at page 1.
I only have Internet Explorer without Addons active. I have Firefox and Chrome but how can I use these.
If I manually used the address in IE, it opens at page 1, but Firefox and Chrome open at the correct page.

The code is

        Set IE = CreateObject("InternetExplorer.Application")
        IE.Navigate Application.ActiveWorkbook.Path & "\" & strMag & "\" & strMag & "-" & strYear & "\" & strFile & "#page=" & iPageNum
        IE.Visible = True

I am using Excel 2003 and IE 11