MVC 3 FormsAuthentication Not working when deployed - asp.net-mvc-3

Question

I have an MVC 3 Application that works fine in my dev environment (you
must have heard that before..) I am deploying it to a free hosting
service http://somee.com for testing, the .NET framework is set to
4. I have a custom membership provider. I am able to register a user, as I can see it in the database, but the user never gets authenticated. I always get redirected to the LogOn page, either after the registration or when loging on. I have done a bin deployment and have this dlls in my bin folder:
•System.Web.Mvc
•Microsoft.Web.Infrastructure
•System.Web.Razor
•System.Web.WebPages
•System.Web.WebPages.Razor
•System.Web.Helpers
In the config:
...
<add key="loginUrl" value="~/Account/Logon" />
</appSettings>
....
<membership defaultProvider="ServiceMembershipProvider">
<providers>
<clear/>
<add name="ServiceMembershipProvider"
type="Infrastruture.ServiceMembershipProvider, Infrastruture" />
</providers>
</membership>
<authentication mode="Forms">
<forms loginUrl="~/Account/LogOn" timeout="2880" />
</authentication>
The controllers:
[HttpPost]
public ActionResult Register(FormCollection registration)
{
try
{
if (ModelState.IsValid)
{
var registrationViewModel = MapFormToRegistrationViewModel(registration);
companyManager.RegisterCompany(registrationViewModel);
FormsAuthentication.SetAuthCookie(registrationViewModel.SystemUserViewModel.Email, false);
return RedirectToAction("Welcome", "Home");
}
else
{
ModelState.AddModelError("", "LogId already taken");
}
}
catch(Exception ex)
{
return View("Register", new RegistrationViewModel(dataReferenceService));
}
return View("Register", new RegistrationViewModel(dataReferenceService));
}
/* /Home/Welcome */
[Authorize]
public ActionResult Welcome()
{ return View(); }
Running out of ideas now ...

Answer 1

I know this is an old question but I had a similar problem and found this while searching for the answer.
The solution is to add the following setting to your web config file.
<appSettings>
<add key="enableSimpleMembership" value="false"/>
</appSettings>
The reason this is required is some pre application startup code appears to have some issues with default settings.
A better explaination and the place I found this solution is here