Try to place a simple text value instead of @Html.Label .....
example:
<fieldset>
<legend>Product Details</legend>
@Html.HiddenFor(model => model.DetailItem.ProductId)
<div class="editor-label">
@Html.LabelFor(model => model.DetailItem.Name)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.DetailItem.Name)
@Html.ValidationMessageFor(model => model.DetailItem.Name)
</div>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>