title: MVC Datatype ErrorMessage
body: <p>DataType ErrorMessage doesn't work.
  MVC4 DataType ErrorMessage doesn't seem to work.
  I have this dataannotation Attribute:</p>
  
  <pre><code>[DataType(DataType.DateTime, ErrorMessage = "Invalid date")]
  public override DateTime? BirthDate { get; set; }
  </code></pre>
  
  <p>but client validation return this error:</p>
  
  <p>The field BirthDate must be a date.</p>
  
  <p>this is the Html portion:</p>
  
  <pre><code> &lt;input Value="" class="date" data-val="true" data-val-date="The field BirthDate  must be a date." data-val-required="El campo Fecha nacimiento es obligatorio" id="Patient_BirthDate" name="Patient.BirthDate" type="text" value="" /&gt;
  </code></pre>
  
  <p>Any idea?</p>