[stuartg123]

Hi,
I have built an application for my college work in WPF browser, but when I try to debug, Firefox opens and gives me a download dialog of the .xbap file, which should run in the browser. This happens in VS2008 Express and VS2010 beta, although it also happens to files that weren't compiled on my computer, and files which were run on other computers fine. I have tried in Internet Explorer and Chrome with the same result. .NET is framework is installed right upto v4.0. This didnt happen before I started using Windows 7, but this shouldn't make much difference, right? I'm also quite sure that IIS is configured correctly. I have also tried installing Vista Premium 32bit on a separate partition, but to no avail.
Any ideas?
Thanks