hi bro
if you can play aa2 2.8.5 - and you can, i know - you dont have to open some other ports.
downlaod aa2assist from
http://aa25assist.sourceforge.net/ -> it will be a zip-file, named as: 25Assist.zip
unzip it all on desktop.
then run the 25Assist.exe with administration rights (right mouse - run as administrator)
maybe it will help you.
if not, then your internet connection has probably a problem.
try to download something else with this volume of data - for example aa2 2.5 from america's army.com.
if this is possible to download - then write again.
i would have to think about - but be sure, we will find the problem.
cya
Merl.
btw: the programm is located at (maybe delete this completely first - it's hidden, you have to unhide it):
C:\Users\your username\AppData\Roaming\25Assist