php problem

Hi, im just a newbi to php and ive read a few tutorials put i seem to have a problem e.g. if i use this code (the file is saved as index.php in my webserver wwwroot) <html> <head> <title>Untitled Document</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> </head> <body> <?phpecho "hello $s"?> </body> </html> and i use the url in my browser http://localhost/index.php?s=steven it will show up in the browser but only "hello" and not "hello steven" as it should. could you please help? Im using IIS4 or latter & PHP4 on WinXP Home. Thanks... slj_bailey@clear.net.nz