Linq2Sql and Client Validation seems not to be working

I have a class generated by the Linq2Sql. I try to add the client validation to its properties, so I do the following:

[MetadataType(typeof(ResourceMetadata))]
public partial class Resource
{
  // Resource is a class in the LINQ to SQL generated data context.
}

public class ResourceMetadata
{
  [Required(ErrorMessage = "error !")]
  public string NewsTitle { get; set; } // the NewsTitle property is also in generated Resource class
}

then, in my View,

<script src="<%: Url.Content("~/Scripts/jquery.validate.min.js") %>" type="text/javascript"></script>
<script src="<%: Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js") %>" type="text/javascript"></script>

<%Html.EnableClientValidation(true); %>

<% using (Html.BeginForm()) { %>
    <%: Html.ValidationSummary(true) %>

    <div class="editor-label">
        <%: Html.LabelFor(model => model.NewsTitle) %>
    </div>
    <div class="editor-field">
        <%: Html.EditorFor(model => model.NewsTitle) %>
        <%: Html.ValidationMessageFor(model => model.NewsTitle) %>
    </div>

     <input type="submit" value="Create" />
<% } %>

the Web.config file

appSettings

add key="webpages:Version" value="1.0.0.0"
add key="ClientValidationEnabled" value="true"
add key="UnobtrusiveJavaScriptEnabled" value="true"   

appSettings

but still, the validation is not working, nothing shows, the model is passed to the server. Why ?

[SOLVED]

The namespaces of the generated class and my class were different. I had to change them to be the same.