Online gaming problem

[Yellow_Frog83]

Hello,

I experienced some problems with GH Metallica online. First of all I cant join any games through invitations, nor no one can join my games, matchmaking searchengine didnt work as well... I read that i should put my console on dmz mode in my router or fowarding ports used by game. I done both of this thing. Now I can join other people games but still no one can join my. When they try to answer my invitation it says "sesion no longer available"

Is there anybody who face similar issues and know the solution??? Thanks in advance.