IE via proxy not working correctly

[allcapone1912]

i have a simple script that check proxy on ip-score.com(with ie.au3)

my code

#include <MsgBoxConstants.au3>
#include <IE.au3>

Local $oIE = _IECreate("http://www.ip-score.com/", 1, 1, 1, 1)
Sleep(5000)
Local $TimeZone = _IEBodyReadText($oIE)
_IEQuit($oIE)

problem is that in internet Explorer is a proxy(not automatic/direct connection)

ie sometime load the page but sometime not, and i get "The page cannot be displayed"

If a make a refresh to page with error its work fine

How to resolve this problem without refreshing page each time?

[mLipok]

Is this only in IE ? or also in GoogleChrome FireFox ?
How this proxy is set ? I mean is this set in windows/IE configuration or on some kind of UTM hardware ?

Edit:
I had not noticed this thread before, so sorry for my lateness

 

Edited October 2, 2016 by mLipok