Why is my ASP.NET MVC persistent auth cookie not working?

Question

I\'m using ASP.NET MVC 3, with forms authentication (based on modified vanilla account code you get with file->new).

When you login, I am setting an auth cookie with

Answer 1

Solved from comment from @alexl:

you can check this answer: Making user login persistant with ASP .Net Membership

Ok, this link seemed to sort it for me - sticking with SetAuthCookie and tweaking my config to explicitly set the cookie name (in the web.confg), and all is working now. Weird! –