[SyDr]

Note: You cannot use _IEFormElementSetValue to set the value of an INPUT TYPE=FILE element. Browser security restrictions prevent this element from being scripted. See the example below for a workaround.

Код:

; *******************************************************
; Example 4 - Set the value of an INPUT TYPE=FILE element
;               (security restrictions prevent using _IEFormElementSetValue)
; *******************************************************
;
#include <IE.au3>

$oIE = _IE_Example("form")
$oForm = _IEFormGetObjByName($oIE, "ExampleForm")
$oInputFile = _IEFormElementGetObjByName($oForm, "fileExample")

; Assign input focus to the field and then send the text string
_IEAction($oInputFile, "focus")


Send("C:\myfile.txt")

Как вариант, можешь переписать код страницы и перезагрузить её.