I am not sure about the IIS version of the Dispatcher you have configured, but certainly with the Apache module if you add a custom HTTP header "dispatcher: nocache" it will not cache the page in the Dispatcher.
You might need to change the code to add this, which would be something like: request.setHeader("Dispatcher", "nocache");
It might also work as meta tags in the html, but I've not tried this.
I am not sure about the IIS version of the Dispatcher you have configured, but certainly with the Apache module if you add a custom HTTP header "dispatcher: nocache" it will not cache the page in the Dispatcher.
You might need to change the code to add this, which would be something like: request.setHeader("Dispatcher", "nocache");
It might also work as meta tags in the html, but I've not tried this.