Deactivating a user roles automatically when email activation is clicked

 Hi I know this is a simple fix but here's my register.aspx.vb and activation.aspx.vb codes. Its given an ordinary user unauthorized permissions after activation from email link which when clicked, approves and logs them in.
 
Protected Sub RegisterUser_CreatedUser(ByVal sender As Object, ByVal e As EventArgs) Handles RegisterUser.CreatedUser
    FormsAuthentication.SignOut() 
    If _group IsNot Nothing Then
      Dim mp As ******WebMembershipProvider = CType(Membership.Provider, ******WebMembershipProvider)
      Dim user As MembershipUser = Membership.GetUser(RegisterUser.UserName)
      mp.AssociateUserWithGroup(user, _group)
 
      Dim cuw As CreateUserWizard = DirectCast(sender, CreateUserWizard)
      Dim userId As Guid ...