Range validation and error message

I have a validation for range for a property in my model and I'm trying to get the message to display when the range isn't 1 to 10 but it doesn't show on the page. This is what I have so far:

        [Required]
        [Range(1, 10, ErrorMessage = "Display Order be between 1 - 10")]
        [DisplayName("Display Order")]
        public int? DisplayOrder { get; set; }