Routes with react-router 1.0.0-rc1, express, web pack - express

Question

I am fairly new to react and express, so sorry for the newb questions.
In react-router v013.3, I used the below config and "this.context.router.transitionTo(payload.route);" to switch routes, and it worked fine.
However, in react-router v1.0.0-rc1, I've tried both "this.props.history.pushState(null, payload.route);" as well as "replaceState", but they don't render my route.
I cannot use the class since I have to switch routes programmatically.
This suggests that I add some code to my express config (please see below): https://github.com/rackt/react-router/blob/master/docs/guides/basics/Histories.md#createbrowserhistory
I also added 'historyApiFallback: true' to my webpack dev server config.
Although via console.log message I see history is receiving the route change request, my requested routes do not render.
Can anyone see what I'm missing?
Thanks!!!
// react-router v013.3
const AppRoutes = (
<Route path="/" handler={App}>
<DefaultRoute handler={Home} />
<Route name="myFieldMapping" handler={MyFieldMapping} />
<Route name="myValidation" handler={MyValidation} />
</Route>
);
Router.run(AppRoutes, Router.HashLocation, (Root) => {
React.render(<Root />, document.getElementById('content'));
});
// react-router v1.0.0-rc1
const myHistory = useBasename(createHistory)({
basename: '/myApp'
});
let unlisten = myHistory.listen(function (location) {
console.log('---...--- CALL TO history: ', location.pathname)
});
React.render((
<Router history={myHistory}>
<Route path="/" component={App} >
<IndexRoute component={Home} />
<Route path="myFieldMapping" component={MyFieldMapping} />
<Route path="myValidation" component={MyValidation} />
</Route>
</Router>
), document.getElementById('content'));
// express config
app.get('/myApp/*', function(request, response){
response.sendFile(path.resolve(__dirname, publicPath, 'index.html'))
});