ClickOnce Install button leads to text

I recently added a new webhost to which I posted a ClickOnce project. In IE9 we have a problem where if you press Install it leads you to a page of text instead of either downloading or installing the application. This does not happen on our old host. What setting do I need on my new host to make it w开发者_如何学编程ork?

The most likely problem is that you haven't got the MIME type for .application files set to "application/x-ms-application" on the server. See this MSDN article for details.