Orchardcms Orchard CMS主题图像未显示

我正在使用正确的helper调用获取主题中图像的URL：

@Url.Content(Html.ThemePath(WorkContext.CurrentTheme, "/Content/Images/my-image.png")

…我知道图像就在那里并且可读。然而，当我试图浏览到它时，它却没有出现！为什么会发生这种情况？

来自文档（）：

要启用文件服务，包含静态文件（如样式表、图像或JavaScript代码）的每个文件夹都应包含包含以下内容的web.config文件：

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.web>
    <httpHandlers>
      <!-- iis6 - for any request in this location,
           return via managed static file handler -->
      <add path="*" verb="*" type="System.Web.StaticFileHandler" />
    </httpHandlers>
  </system.web>
  <system.webServer>
    <handlers accessPolicy="Script,Read">
      <!-- iis7 - for any request to a file exists on disk,
           return it via native http module.
           accessPolicy 'Script' is to allow for a managed 404 page. -->
      <add name="StaticFile" path="*" verb="*" modules="StaticFileModule"
           preCondition="integratedMode" resourceType="File"
           requireAccess="Read" />
    </handlers>
  </system.webServer>
</configuration>