I'm trying to configure Media Wiki under SUSE Linux Enterprise Server 10. All prerequisite software has been installed and is running. However, when I attempt to open 'index.php' in my /public_html/wiki/config directory I'm presented w/a prompt to either open w/Firefox (the default) or save to disk. If I select 'OK' to open I'm presented w/the very same prompt. Any idea on what setting I need to correct?

Thanks