Can't get Web API 2 to work

Trying to get Web API working but I'm just getting 404s no matter what I do.

// Global.asax
GlobalConfiguration.Configure(WebApiConfig.Register);
// WebApiConfig.cs
public static void Register(HttpConfiguration config)
{
  config.MapHttpAttributeRoutes();
}
// ApiController in directory /ApiControllers
[RoutePrefix("api/requestpassword")]
public class RequestPasswordController : ApiController
{
  [Route("")]
  public HttpResponseMessage Get()
  {
    return Request.CreateResponse(HttpStatusCode.OK);
  }
}
// Request is localhost:37001/api/requestpassword GET

Any ideas? I'm all out...