I've got a Silverlight project that is very low security but does use the membership provider for logging in members to post in a forum. I wrote my own login/out and pw change functions which all seem to work fine but regardless of what I do, you're asked to log in in a short time (probably the 30 min default).
In my log in I have this, which I thought set the persistence as true:
WebContext.Current.Authentication.Login(log,thisGo to the complete details ...