Game Fails to Launch when trying play coop over the same network.

My Dad and myself are trying to play a coop game whether it be skirmish or a quest and none of it works. I am able to check coop or add him into the Skirmish, but when we launch the game it will just say "Creating Game..." until eventually it stops and says "Game failed to Launch" in the chat box. I understand that certain ports must be open UDP 1000-1005 I believe I read. I have opened all those, checked antivirus and firewall permissions and even went so far to check my router itself which has UPnP enabled. We play Starcraft 2 together all the time with no issues at all. Never had a drop out or as much as even lag. My internet connection is about 900mbps and around 600 - 700mbps on upload so it is blazing fast. Any idea what might be causing this? We can both play solo no issue, but haven't tried playing with anyone else.

 

Tried all that and still no luck. We can see each other in the game and we can add eachother into a skirmish or hit the coop on a quest, but then "Creating Game..." comes up and nothing. Even tried connecting through Hamachi because I have heard people have has success with that, but same problem.

 

Also I tried to trade with him just to see if that would do anything and it worked perfectly.