Since you are using MS Front Page, I will assume you are using IIS on Windows. If this is the case, is PHP installed in your server ?
If it is, is it set to parse files with the proper file extension ?
When you say "blank screen" do you mean the page loads, but no HTML is visible or do you get a "Page Not Found" or 404 error or somethins similar ?
If the page loads, can you right click and view the HTML source and see anything ?