php scripts will not run

HI everyone, This is my first post. Not sure if it is or will work. Here is my problem as a newby. I installed apache 2.2 and php 5 on windows xp using the installer. I configured php and apache config files with the online help. When I try to open a php script nothing happens, but the apache server is running fine. I want to test run some php scripts. I can't figure what else to do? Any ideas? -- Sincerely, Fred Gregorian, PharmD.