Hello,
I try to integrate a forum in a existing .net MVC website.
For now I don't want to merge the authentication. I use the MVC authentication for the website and the default YAF authentication on the forum.
https://github.com/YAFNE...ting-ASP.NET-Application 
My problem is that it seems I can log in (I enter my login and my password and I haven't error message), but when I am redirected on the homepage I'm not connected.
Do you have an idea to solve this problem ?

For now I don't want to merge the authentication. I use the MVC authentication for the website and the default YAF authentication on the forum.

Well if yo dont merge the authentication then of course it can't work together and you have to login separately.