Monster Hunter Portable 3rd (HD Ver. or not)

[NeXo75013]

Hi everyone I have a problem with Monster Hunter 3rd HD.
I Can join a quest and using 25% trick make it working.
But I can't Host the quest...even when i do the same trick which makes it work as a guest...
And It is the same when i'm Hosting the server or when someone else Host the server...

Hi everyone I have a problem with Monster Hunter 3rd HD.
I Can join a quest and using 25% trick make it working.
But I can't Host the quest...even when i do the same trick which makes it work as a guest...
And It is the same when i'm Hosting the server or when someone else Host the server...

I Forwarded a lot of ports so this should not be the problem...

Just to be more precise here is the trick i use when i join a quest and make it works each time : When the Quest Host launches the quest i wait to ear the hunt Horn to use 25% trick during the noise.(so before i see loading screen)
Then i untoogle when the quests starts.
I noticed that i can untoogle as soon as the "begginning quest" message appears in the loading screen ans it works as well.

So What is the problem with me Hosting quests ?

Im from France
My MAX ping is 150ms with US people
and 60-70 with EU people (playing with swedish and Ukrainian)
When pingin google.com with cmd i get 10-15 ping