I have a login form which I want to use to pass a LoginViewModel back to the controller, even though the model inherits from RenderModel I get this error

'Umbraco.Web.Models.RenderModel', but this dictionary requires a model item of type 'OSConfs.Models.UmbracoIdentity.LoginViewModel'.

I seem to be missing a step.

My View:

@inherits Umbraco.Web.Mvc.UmbracoTemplatePage
@Html.Partial("~/views/partials/_login.cshtml")

My partial view:

@model OSConfs.Models.UmbracoIdentity.LoginViewModel

My view Model:

    public class LoginViewModel : RenderModel

I have tried variations of this also, ie having no partial view and having the Login.cshtml strongly typed to LoginViewModel

also tried using @inherits

@inherits Umbraco.Web.Mvc.UmbracoViewPage<OSConfs.Models.UmbracoIdentity.LoginViewModel>

On both either the login page or the partial view, but I get the same message.

If it's relevant the controller inherits from SurfaceController.

Cheers in advanced