AspNet Identity not using custom PasswordValidator code in IdentityConfig - asp.net

Question

I've been trying to work this problem out for over a week and can't seem to work out why it isn't working. I'm using ASP.NET Web Forms.
I have updated the following on my IdentityConfig.vb file to reduce the password requirement so it doesn't need any uppercase or numeric value:
manager.PasswordValidator = New PasswordValidator() With {
.RequiredLength = 4,
.RequireNonLetterOrDigit = False,
.RequireDigit = False,
.RequireLowercase = False,
.RequireUppercase = False
}
And this is the code I have to create a user
Protected Sub CreateUser_Click(sender As Object, e As EventArgs)
Dim userName As String = TextBox1.Text
Dim manager = Context.GetOwinContext().GetUserManager(Of ApplicationUserManager)()
Dim signInManager = Context.GetOwinContext().Get(Of ApplicationSignInManager)()
Dim user = New ApplicationUser() With {.UserName = userName, .Email = userName}
Dim result = manager.Create(user, TextBox2.Text)
If result.Succeeded Then
signInManager.SignIn(user, isPersistent:=False, rememberBrowser:=False)
Response.Redirect("/member")
Else
Literal1.Text = result.Errors.FirstOrDefault()
End If
End Sub
But for some reason no matter what I try it's using the default password requirement and giving me the following validation messages when trying to create an account.
Passwords must be at least 6 characters. Passwords must have at least one non letter or digit character. Passwords must have at least one lowercase ('a'-'z'). Passwords must have at least one uppercase ('A'-'Z').
I have moved the register page out of the /account section.
Does anybody know what I've done wrong?
Edit 1: Reference to ApplicationUserManager in my IdentityConfig file
Public Class ApplicationUserManager
Inherits UserManager(Of ApplicationUser)
Public Sub New(store As IUserStore(Of ApplicationUser))
MyBase.New(store)
End Sub
Public Shared Function Create(options As IdentityFactoryOptions(Of ApplicationUserManager), context As IOwinContext) As ApplicationUserManager
Dim manager = New ApplicationUserManager(New UserStore(Of ApplicationUser)(context.[Get](Of ApplicationDbContext)()))
' Configure validation logic for usernames
manager.UserValidator = New UserValidator(Of ApplicationUser)(manager) With {
.AllowOnlyAlphanumericUserNames = False,
.RequireUniqueEmail = True
}
' Configure validation logic for passwords
manager.PasswordValidator = New PasswordValidator() With {
.RequiredLength = 4,
.RequireNonLetterOrDigit = False,
.RequireDigit = False,
.RequireLowercase = False,
.RequireUppercase = False
}
' Register two factor authentication providers. This application uses Phone and Emails as a step of receiving a code for verifying the user. '
' You can write your own provider and plug in here. '
manager.RegisterTwoFactorProvider("Phone Code", New PhoneNumberTokenProvider(Of ApplicationUser)() With {
.MessageFormat = "Your security code is {0}"
})
manager.RegisterTwoFactorProvider("Email Code", New EmailTokenProvider(Of ApplicationUser)() With {
.Subject = "Security Code",
.BodyFormat = "Your security code is {0}"
})
' Configure user lockout defaults '
manager.UserLockoutEnabledByDefault = True
manager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(5)
manager.MaxFailedAccessAttemptsBeforeLockout = 5
manager.EmailService = New EmailService()
manager.SmsService = New SmsService()
Dim dataProtectionProvider = options.DataProtectionProvider
If dataProtectionProvider IsNot Nothing Then
manager.UserTokenProvider = New DataProtectorTokenProvider(Of ApplicationUser)(dataProtectionProvider.Create("ASP.NET Identity"))
End If
Return manager
End Function
End Class