a program that was written some years ago in an xp machine and updated to windows 10 64 bit

Code:
ret = DeleteUrlCacheEntry(filename)
Set wb = CreateObject("internetexplorer.application")
If Not wb Is Nothing Then wlog "Internet Explorer created,"
wb.navigate2 (filename)
ret returns 0
getlastdllerror returns 2

i have cleared cache entries in internet explorer, but the file version loaded is not the current file but an old copy

any suggestions, or fixes?
is this likely to be a 64 bit API problem, or some change to the internet cache?