Durandal not passing parameters to MVC controller action

I'm having a problem using parameters in Durandal for an ASP.NET MVC application...

I use MVC Route Attributes, for example: [Route("admin/pages")], [Route("admin/blog")], etc..

And I integrate Durandal as follows:

main.js:

app.start().then(function() {
    viewEngine.viewExtension = '/';

    viewLocator.convertModuleIdToViewId = function (moduleId) {
        return moduleId.replace('viewmodels', '');
    };

    app.setRoot('viewmodels/admin/shell', 'entrance');
});

This works nicely, as the viewId ends up matching the MVC route.

However, I now face a serious problem with trying to use parameters in the routes. For example, I have one route as follows:

[Route("admin/localization/localizable-strings/{languageId}")]

and my Durandal route for this is:

localization/localizable-strings/:languageId

Example anchor tag:

<a href="/admin/#localization/localizable-strings/1" class="btn btn-primary btn-xs">Localize</a>

This doesn't work, as it seems Durandal doesn't pass the parameter to the server. It simply retrieves the HTML from /admin/localization/localizable-strings which returns a 404 page because no parameter was passed to the MVC action.

What are my options here?