All ports are open. UPnP is enabled. Firewall exceptions added for Voobly and AoK. 1.0e Patch installed. Router reset and checked. STILL getting connection errors with 6/7 players on average.

This is the ONLY game I ever have multiplayer issues with, can play any other multiplayer game no problem. What the hell is the deal?

I wouldn't even care because FP doesn't even cause game problems except I am constantly kicked from lobbies because of it.

hi
a check list
is the game installed like this: http://www.voobly.com/forum/thread/163759
do you have more than one pc firewall? [inbuilt windows one and perhaps anti-virus with one]
the only port you need here is 16000udp, directed to your playing pc private ip. [192.168.1.xxx]
[turn off UPnP as you ports forwarded.]

Yes. Installed and running in compadability mode.
No. Only 1 firewall.
UPnP has no effect on or off.

hi
check the ports are connecting with this free app Network Utilities Bundle.:
[You must login to view link]
check your private playing ip is still the same as when you forwarded the ports.
remove all temp files from here: C:\Program Files\Microsoft Games\Age of Empires II\SaveGame\Multi
or
C:\Program Files[86]\Microsoft Games\Age of Empires II\SaveGame\Multi
upnp needs to be off if you have any ports forwarded.