LoadData event are not fired

Radzen.Blazor Components
1

Hi when are the LoadData event fired? My LoadData eventhandler are never called.
Have been reading this example over and over but can't get it to work.

 <RadzenGrid @ref="ContactsGrid"
         Data="@Contacts"
         Count="@ContactsCount"
         LoadData="@GridLoadData"
         TItem="Contact"
         AllowSorting="true"
         AllowFiltering="true"
         AllowPaging="true"
         FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive"
         RowDoubleClick="@(item => GridEditButtonClick(item))" @onclick:stopPropagation="true"
         RowSelect="args => SelectedContact = (Contact)args"
         PageSize="25"
         Style="max-width: 1500px">
 <Columns>
     <RadzenGridColumn TItem="Contact" Property="FirstName" Title="First name" />
     <RadzenGridColumn TItem="Contact" Property="LastName" Title="Last name" />
     <RadzenGridColumn TItem="Contact" Property="Title" Title="Title" />
     <RadzenGridColumn TItem="Contact" Property="Phone" Title="Phone" />
     <RadzenGridColumn TItem="Contact" Property="Mobile" Title="Mobile" />
     <RadzenGridColumn TItem="Contact" Property="Customer.CompanyName" Title="Customer" />
     <RadzenGridColumn TItem="Contact" Property="Customer.AddressCity" Title="Customer city" />
     <RadzenGridColumn TItem="Contact" Filterable="false" Sortable="false" Width="70px" TextAlign="TextAlign.Center">
         <Template Context="data">
             <RadzenButton ButtonStyle="ButtonStyle.Primary" Icon="create" Size="ButtonSize.Small" Click="@(_ => GridEditButtonClick((Contact)data))" @onclick:stopPropagation="true">
             </RadzenButton>
         </Template>
     </RadzenGridColumn>
 </Columns>

This is my eventhandler

 private async Task GridLoadData(LoadDataArgs args)
  {
 try
 {
     var res = await ODataListService.GetCustomerContacts(filter:$"{args.Filter}", @orderby:$"  {args.OrderBy}", top:args.Top, skip:args.Skip, count:args.Top != null && args.Skip != null);
     Contacts = res.Value.AsODataEnumerable();
     ContactsCount = res.Count;
     StateHasChanged();
  }
 catch (Exception)
 {
     NotificationService.Notify(NotificationSeverity.Error, $"Error", $"Unable to load CustomerContacts");
 }
 }

And my OData controller, that's workes

 [ApiController]

[Route("api/[controller]")]
public class CustomerContactsController : ControllerBase
{
private readonly SamDBContext _context;

 public CustomerContactsController(SamDBContext context)
 {
     _context = context;
 }

 [HttpGet]
 [EnableQuery(MaxExpansionDepth = 10, MaxAnyAllExpressionDepth = 10, MaxNodeCount = 100, PageSize = 100)]
 public IEnumerable<Contact> GetCustomerContacts()
 {
     return _context.Contacts.Include(x => x.Customer).Where(x => x.Active).AsQueryable();
 }

}

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